Superhero's garment (4)
I believe the answer is:
cape
'superhero's garment' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for cape that I've seen before include "Sleeveless garment like a cloak" , "An old cloak or a headland" , "Horn or Good Hope - cloak" , "Covering for the shoulders" , "Cod possibly" .)