Area of trees (4)
I believe the answer is:
wood
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">area of trees</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for wood that I've seen before include "Area of trees and shrubs" , "What you might need to play golf" , "Forest - golf club - biased bowl" , "Lots of trees" , "Section of orchestra" .)