Artist’s prize returned (6)
I believe the answer is:
drawer
'artist's' is the definition.
(drawer is a kind of artist)
'prize returned' is the wordplay.
'prize' becomes 'reward' (I've seen this before).
'returned' shows that the letters should be reversed in order.
'reward' in reverse letter order is 'DRAWER'.
(Other definitions for drawer that I've seen before include "Box-like container that slides" , "It slides into the furniture" , "that's in a chest" , "Reward (anag.)" , "One providing cheque" .)