Confine Oscar before judgement (7)
I believe the answer is:
opinion
'judgement' is the definition.
(I know that judgement can be written as opinion)
'confine oscar before' is the wordplay.
'confine' becomes 'pinion' (pinioning is a kind of confining).
'oscar' becomes 'O' (phonetic alphabet: alpha, bravo, charlie etc.).
'before' is a charade indicator (letters next to each other).
'pinion' after 'o' is 'OPINION'.
(Other definitions for opinion that I've seen before include "Assessment" , "Unproved belief or view" , "View, barrister's advice" , "school of thought" , "Viewpoint" .)