Ancient Germanic invader (4)
I believe the answer is:
goth
'ancient germanic invader' 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 "Teutonic invader of the Roman Empire" , "Uncivilised type" , "Uncivilised person" , "Old invader" , "Youngster clad in black" .)