Old Icelandic work
I believe the answer is:
edda
'old icelandic work' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for edda that I've seen before include "Scandinavian books of myths" , "mythological book" , "Icelandic poems" , "Ancient Icelandic writings" , "Ancient books" .)