Gangster stole crack (8)
I believe the answer is:
scarface
'gangster' is the definition.
(nickname of Al Capone)
'stole crack' is the wordplay.
'stole' becomes 'scarf' (stole can mean a scarf or shawl).
'crack' becomes 'ace' (I've seen this in another clue).
'scarf'+'ace'='SCARFACE'
(Other definitions for scarface that I've seen before include "American gangster" , "US gangster" , "Al Capone's nickname" , "So-called gangster" , "Film starring Al Pacino" .)