Crossword Genius

Puckery (4)

Ross

I believe the answer is:

sour

(Other definitions for sour that I've seen before include "Acid - bitter" , "Acrid or sullen" , "Tart, acidic" , "Tasting sharp like stale milk" , "Disparagement of something one can't have oneself" .)

I've seen this clue in the LA Times.
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