Resin source (4)
I believe the answer is:
pine
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">resin source</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for pine that I've seen before include "Conifer grown for wood" , "Long - timber" , "Yen - tree" , "Mope; tree" , "Long for the conifer?" .)