Japanese miniature tree (6)
I believe the answer is:
bonsai
'japanese miniature tree' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for bonsai that I've seen before include "Japanese method of growing miniature plants" , "Japanese plant or tree grown in miniature form" , "(Cultivation of) dwarf trees" , "Dwarf tree found in Bosnia" , "Japanese art of growing dwarf trees" .)