Overlook scam, finished (7)
I believe the answer is:
condone
'overlook' is the definition.
(I've seen this before)
'scam finished' is the wordplay.
'scam' becomes 'con' (I've seen this in another clue).
'finished' becomes 'done' (similar in meaning).
'con'+'done'='CONDONE'
(Other definitions for condone that I've seen before include "Accept (wrong behaviour)" , "Overlook intentionally" , "Approve, sanction" , "Turn a blind eye" , "Nod once (anag) -- make allowances for" .)