Spoiled food? (4,6)

I believe the answer is:

sour grapes

(Other definitions for sour grapes that I've seen before include "Disdain that covers disappointment" , "pretended disdain" , "Selfishly disparaging attitude" , "Derision of the unattainable" , "Bitterness" .)

I've seen this clue in The Wall Street Journal.

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