Carved brooch (5)
I believe the answer is:
cameo
'carved brooch' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for cameo that I've seen before include "Part in movie" , "Small role - gem with a figure carved in relief" , "Piece of jewellery with carved portrait" , "Small part for star actor" , "Carving in relief, on a brooch say" .)