A drawback for Oscar, say? (5)
I believe the answer is:
award
'oscar say?' is the definition.
(oscar is a kind of award)
'a drawback' is the wordplay.
'drawback' becomes 'ward' (I've seen this in other clues).
'a'+'ward'='AWARD'
'for' is the link.
(Other definitions for award that I've seen before include "Adjudge" , "Perhaps Tony" , "Present - prize" , "Give, as an honour" , "Allotment" .)