Softwood (4)
I believe the answer is:
pine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">softwood</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that pine is a type of softwood)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pine that I've seen before include "Yen - tree" , "Mope; tree" , "Tree, waste away" , "Conifer grown for wood" , "Coniferous tree" .)