Odin's realm (8)
I believe the answer is:
valhalla
'odin's realm' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for valhalla that I've seen before include "Scandinavian paradise" , "palace full of souls" , "In Scandinavian myth, the hall for souls of slain heroes" , "In Norse mythology, the hall for the souls of heroes" , "Norse home of the gods" .)