[[Big Bend State]] etc.
I suppose I'd gloss it with official nickname then, if that's a thing! like putting term of address on something like grandmamma (can't think of a real term-of-address example but did see one the other day). It just seems semantically wrong to define X as "a nickname for..." when that is not the definition of X.
I agree that what is listed is not a definition, per se, which is a problem with content like this which is fundamentally encyclopedic. I think what you are saying is to do something like this:
- (official nickname) The state of Alaska in the United States.
Which is not any different except to a couple hundred people who are editors here, and I think violates the spirit of {{label}}
(or whatever is the right one of those to use now). I don't have strong feelings about it guess.
The arcane {{non-gloss definition}}
seems like the thing to use here. It's a pain to write out, but I would write either "{{n-g|Nickname for}}
the state of Alaska in the United States" or "{{n-g|Nickname for the state of Alaska in the United States}}
".