Cymbal relative (4)
I believe the answer is:
gong
'cymbal relative' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for gong that I've seen before include "Sound announcing meal" , "Percussion instrument - medal (slang)" , "Medal (sl.)" , "Dinner chime or slangy medal" , "Round plate that resounds when struck" .)