Is Oscar slow to get divorce? (7)
I believe the answer is:
isolate
'divorce?' is the definition.
(divorce can mean to isolate or separate)
'is oscar slow' is the wordplay.
'oscar' becomes 'O' (phonetic alphabet: alpha, bravo, charlie etc.).
'slow' becomes 'late' (I've seen this in another clue).
'is'+'o'+'late'='ISOLATE'
'to get' is the link.
(Other definitions for isolate that I've seen before include "Single out" , "Set apart, quarantine" , "Cut off from all contact" , "Place apart from others or alone" , "divorce" .)