Viking garment (5)
I believe the answer is:
tunic
'viking garment' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tunic that I've seen before include "Loose fitting light cloak extending to the hip or lower" , "Jacket of some soldiers" , "(Policeman's) jacket" , "Knee-length cloak" , "Roman garment" .)