Uncovered painting (4)
I believe the answer is:
nude
This clue is a double definition.
'uncovered' is the first definition.
(I've seen this in another clue)
'painting' is the second definition.
(I know that nude is a type of painting)
(Other definitions for nude that I've seen before include "Completely unclothed" , "rejecting coverage?" , "totally exposed" , "Classic art subject" , "In the altogether" .)