Gangster stole one (8)
I believe the answer is:
scarface
'gangster' is the definition.
(nickname of Al Capone)
'stole one' is the wordplay.
'stole' becomes 'scarf' (I've seen this before).
'one' becomes 'ace' ('ace' can be a synonym of 'one').
'scarf'+'ace'='SCARFACE'
(Other definitions for scarface that I've seen before include "So-called gangster" , "Al Capone's nickname" , "Al Capone, or Tony Montana - 'Say hello to my little friend'." , "US gangster" , "American gangster" .)