Capone and sweetheart totally finished (3,4)
I believe the answer is:
all over
'totally finished' is the definition.
'all over' can be an answer for 'finished' (similar in meaning). I'm unsure of the 'totally' bit.
'capone and sweetheart' is the wordplay.
'capone' becomes 'Al' (gangster Al Capone).
'and' is a charade indicator (letters next to each other).
'sweetheart' becomes 'lover' (sweetheart can mean a lover).
'al'+'lover'='ALL-OVER'
Can you help me to learn more?
(Other definitions for all over that I've seen before include "Excessively attentive" , "covering everything" , "very characteristically" , "Finished" , "typically" .)