I had a quick search around and couldn't find anything, so I can only conclude this resource lacking.

- http://skyrim.nexusmods.com/mods/30625 -

For Skyrim version 1.8.151.0.7

What is a clean save?:

It is usually referred to in a troubleshooting environment; it is a save that has never seen a mod(s) before. It is clean because it has not been "dirtied" by, or exposed to any information and/or data from any mod(s). It is for this reason it becomes an ideal (necessary) testing environment when troubleshooting mods.
Unlike previous Bethesda games (Recent Fallout's, Oblivion) a clean save can't simply be made by uninstalling mods and then making a fresh save. You will orphan a lot of data that way.
See below for more information.

Why use a clean save?:

It ensures no remnant or persistent data is distorting your results, giving you feedback that is accurate. Teleporting from the Main Menu is a popular method, but it should not be relied upon for serious testing. A lot of things get initialised when going through the new game sequence, it is important to test mods in the environment to which they will be applied (how many people started their actual playthrough by teleporting from the main menu?). Furthermore, we're sick of asking. If you are having problems and tell people that you are testing with a certified clean save we are one step closer to a potential resolution.

About:

I think a lot of people could benefit from this. It saves you having to go through the tedium of the starting sequence (or a clean install of Skyrim) if you haven't got access to a save like this already.

I also have hopes that this kind of thing can become a standard when troubleshooting. Eg. "Did you test with the latest Clean Save Resource?"
Surely by now we're all sick of asking about, hearing about, and answering questions relating to clean saves and the testing of mods.


Notes:

The save has been made inside Helgen Keep, right after having hands unbound. No mods installed, requires only Skyrim and Update.ESM.
Archive includes very first auto save forced by the game (for anyone who wants it).
My personal recommendation is to use Save 2 - Prisoner Helgen Keep.


Installation:

• Download the archive to your computer
  
• Extract the save to wherever your saves are located. (For Windows 7 it's usually - Documents\My Games\Skyrim\Saves)
  
• Test your mods
  
• Do not overwrite this save!

Uninstallation:

• Really?
  
• Remove the save file manually or in-game
  
• Reel from your loss

Permissions:

No credit necessary. Just spread the word where you can, it would be excellent if this sort of procedure became standard for everyone who posts about issues that are potentially related to a dirty save.


Availability:

Currently limited to https://www.dropbox.com/sh/9kn9ef64w0k2vuf/wLo3HTynR7 and the http://skyrim.nexusmods.com/mods/30625. Expect to see it on TESA soon.


Reference Material:

http://www.creationkit.com/Save_File_Notes_(Papyrus) - CK Wiki Article
http://www.gamesas.com/topic/1433310-what-is-a-clean-mod-and-a-clean-save/ - CK Forums Discussion. Of note are posts from a http://www.gamesas.com/user/183997-smkviper/ (http://www.gamesas.com/topic/1433310-what-is-a-clean-mod-and-a-clean-save/page__p__22016386#entry22016386, http://www.gamesas.com/topic/1433310-what-is-a-clean-mod-and-a-clean-save/page__p__22019875#entry22019875)

If anyone else has good links please post them here! We need this information to get out there!
(it would also be good to have a definitive thread discussing precisely what a clean save is somewhere so I can link to it)

Great idea!

And done. http://skyrim.nexusmods.com/mods/30625

I'll try and point people to it when troubleshooting. Mind you, using the terminology of "clean save" will irritate some people... They're not the same as before, and essentially don't exist. But if everyone's running from the same, unmodded resource, then it should reduce the chances of failing to reproduce a bug.

I don't know what else to call it. I'll try to update the OP to also be more informative, but more people do need to know that clean saves are a bit different when it comes to Skyrim.
I agree, if people can say that they tested with a save-game known to be clean we can all stop asking (maybe the OP's too, because they might not have to post).

Distinguishing it as an unmodded clean save would probably be as clear as it is going to get.

I don't mean to be rude, but I don't see how this isn't redundant. It wouldn't be a clean save if it had any dependencies. It's a distinction without a difference.

I agree with the sentiment that clean save is a fallacious term. It implies that it has been cleaned by re-saving after removing all mods as that has been our procedure for years. I think a better terminology would be "pure save". Essentially that is what it really is.

Edit: alternatively, "vanilla save" is an equally accurate description.

It doesn't imply that at all. There is nothing about the word "clean" that suggests it was ever "dirty."

The term "clean save" is only fallacious when used in the same sense as it was in previous games. You cannot "clean" a save that has already been played with mods installed. The only truly clean save is one that has never had any mods. Interestingly, that's exactly what this resource is.

THAT is the entire point. You can't stop people from associating ANY terms used in this cycle with the terms used in the previous cycles.

What about calling it a "virgin save"?

I don't think implementing another term is going to mitigate that issue, people just need to learn that things shift from title to title.
I think using the most widespread term is the healthiest option for the community. It's more educational/re-educational and actually less confusing if (when) you start talking about clean saves, pure saves, and vanilla saves all at once.

Hahah, sounds like some sort of saving throw.

Yeah, good luck with that. It's a logical thing to want but far from practical. It's far easier and much less hassle for all concerned to create a new term rather than trying to redefine an existing one.