A barbarian (4)
I believe the answer is:
goth
'a barbarian' is the definition.
(I know that barbarian can be written as Goth)
This is the entire clue.
(Other definitions for goth that I've seen before include "One of an ancient Germanic nation" , "Fan of gloomy music" , "Rocker" , "Teutonic barbarian" , "Old invader" .)