Cobra feature (4)
I believe the answer is:
hood
'cobra feature' 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 "A cover; Bismarck sank it, 1941" , "Gangster - cover for head of falcon" , "See 13" , "Thomas -, Eng. poet" , "Cover - American gangster - Robin?" .)