Art of growing miniature trees (6)
I believe the answer is:
bonsai
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">art of growing miniature trees</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for bonsai that I've seen before include "Japanese art of growing dwarfed trees" , "Bosnia (anag.)" , "Japanese art of growing miniature trees" , "Japanese craft of growing dwarf trees" , "stunted growth" .)