Martial art with bamboo swords (5)
I believe the answer is:
kendo
'martial art with bamboo swords' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for kendo that I've seen before include "Martial art involving stick fighting" , "Japanese fencing with bamboo swords" , "Japanese fencing with bamboo staves" , "Jap. fencing with staves" , "Asian sport" .)