Dwarfed shrub (6)
I believe the answer is:
bonsai
'dwarfed shrub' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for bonsai that I've seen before include "Dwarf trees and shrubs" , "Dwarf tree found in Bosnia" , "Mini-tree growing" , "Art of dwarfing shrubs" , "The art of growing ornamental dwarfed plants" .)