Arrest the devil (4)
I believe the answer is:
nick
I believe this clue is a double definition.
'arrest' is the first definition.
(thesaurus)
'the devil' is the second definition.
(Nick and Old Nick are names for the Devil)
(Other definitions for nick that I've seen before include "chip" , "Steal (sl.)" , "jug" , "diabolical person's name" , "Small cut or notch" .)