Like Loki (5)
I believe the answer is:
norse
'like loki' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for norse that I've seen before include "like the Valkyries?" , "These men were Vikings" , "Snore (anag)" , "Ancient Scandinavian language" , "Of old Scandinavia" .)