Coat part (4)
I believe the answer is:
hood
'coat part' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hood that I've seen before include "See 5" , "Part of subfusc" , "Outlaw and gangster" , "Cowl -- violent criminal (slang)" , "Cover < the upper part < of tough" .)