Icelandic epic (4)
I believe the answer is:
edda
'icelandic epic' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for edda that I've seen before include "Collection of Old Norse poetry" , "Collection of myths" , "Scandinavian books of myths" , "Norse poem collection" , "Old Icelandic book" .)