Crossword Genius

Backfiring deed (3,4)

Ross

I believe the answer is:

own goal

(Other definitions for own goal that I've seen before include "Act harming the perpetrator's interests" , "unintentional problem for herself, say" , "embarrassing error" , "bad mistake" , "Unintentional self-inflicted harm" .)

I've seen this clue in The Sunday Times.
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