Pendant (9)
I believe the answer is:
medallion
'pendant' is the definition.
(I have seen 'Round pendant ' mean 'medallion' so perhaps 'pendant' could also mean 'medallion')
This is the entire clue.
(Other definitions for medallion that I've seen before include "Mad O'Neill wins the award" , "Large coin-shaped metal ornament" , "(Commemorative) disc" , "Circular piece of meat - commemorative award" , "prize" .)