Arrest mean criminal, e.g. 'Scarface' (8)
I believe the answer is:
nickname
'e g scarface' is the definition.
I can't judge whether this definition defines the answer.
'arrest mean criminal' is the wordplay.
'arrest' becomes 'nick' (I've seen this before).
'criminal' indicates anagramming the letters.
'mean' is an anagram of 'name'.
'nick'+'name'='NICKNAME'
Can you help me to learn more?
(Other definitions for nickname that I've seen before include "Fond title" , "A handle" , "Jack the Ripper, for example" , "Friendly appellation by which person is known" , "Cognomen" .)