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Solution: find a a clue of the desired type that is at least as good as the existing clue to a different entry, and stick with the better one of the other type.

I don't think there's a clue type that *should* be in every cryptic. If you do no homophones or no ddefs, I think no one really notices, as long as there's a variety in the clues you do use. I have known solvers who notice when there's no hiddens (because they do a pass just looking for hiddens).