Subculture known for wearing black (4)
I believe the answer is:
goth
'subculture known for wearing black' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for goth that I've seen before include "Uncivilised person" , "Uncivilised type" , "Rock music fan favouring black clothing" , "Rock music with gloomy lyrics" , "Teutonic barbarian" .)