Frigg's husband (4)
I believe the answer is:
odin
'frigg's husband' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for odin that I've seen before include "Mythological Norse god of war" , "Supreme god of Scandanavian myth" , "King of Norse gods" , "Supreme Scandinavian god - what a racket" , "Supreme god of war in Norse mythology" .)