Traditional Japanese robe (6)
I believe the answer is:
kimono
'japanese robe' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for kimono that I've seen before include "dressing-gown" , "Long loose Japanese robe" , "Loose robe, originally Japanese" , "Japanese attireimoni" , "Japanese loose, sashed garment" .)