Clarify definition to make clear that it's about a character or story's emphasis on the body part but retain current name.

Rename to Ass Focus make definition clearer that it's about the story or character's emphasis on the feature rather than just the feature itself.

Keep as is, prune examples to just be about focus on the body part.

Make it a redlink like - for example - "No Just No", which redirects to the "No Just No Reaction", only with a key difference: the trope still exists as it always did, but in this case it creates a redlink only when potholed, and a blue link when it's listed among other tropes*

(As in, for example, after the * bullet.)

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