Sketch an upturned prize (5)
I believe the answer is:
award
'prize' is the definition.
(I know that prize can be written as award)
'sketch an upturned' is the wordplay.
'sketch' becomes 'draw' (I've seen this in other clues).
'an' becomes 'a'.
'upturned' says the letters should be written backwards.
'draw'+'a'='drawa'
'drawa' backwards is 'AWARD'.
(Other definitions for award that I've seen before include "medal, say" , "Arbitrator's decision" , "Honour, prize" , "They are disinclined to work" , "Maybe damages" .)