Japanese martial art (6)
I believe the answer is:
aikido
'japanese martial art' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for aikido that I've seen before include "one of the martial arts" , "Japanese martial art similar to judo" , "Martial art, akin to judo" , "Defensive moves" , "Japanese form of self-defence" .)