"Scarface" (6)
I believe the answer is:
capone
'scarface' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for capone that I've seen before include "US gangster (St Valentine's Day massacre)" , "Al - , notorious gangster" , "Al ..., US gangster" , "Mountain said to be resting place of Noah's Ark" , "Notorious criminal" .)