Hun head (6)
I believe the answer is:
attila
'hun head' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for attila that I've seen before include "A very great Hun of old" , "King of the Huns, d. 453" , "conquered Europe" , "Fifth-century king of the Huns" , "Brutal Hunnish king" .)