Sport with bamboo swords (5)
I believe the answer is:
kendo
'sport with bamboo swords' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for kendo that I've seen before include "Japanese fencing with bamboo swords" , "Marrtial art" , "Japanese martial art using split bamboo swords" , "Japanese art of fencing with staves" , "Jap. fencing with staves" .)