Crossword Genius

Really ticked (4)

Ross

I believe the answer is:

sore

(Other definitions for sore that I've seen before include "Painful or informally angry" , "Boil" , "Feeling pain or informally angry" , "buck" , "Hurt" .)

I've seen this clue in the Newsday.com, The Washington Post, The A.V Club, the LA Times, the New York Times and the L.A. Times Daily.
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