Crossword Genius

Percussive disk (4)

Ross

I believe the answer is:

gong

(Other definitions for gong that I've seen before include "Dinner bell or slangy medal" , "Sound announcing meal" , "Sound it, for dinner say" , "Disc struck at meal times - medal" , "Resonant metal disc" .)

I've seen this clue in The Washington Post.
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