Pine exudation (5)
I believe the answer is:
resin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pine exudation</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for resin that I've seen before include "varnish, perhaps" , "Sticky tree exudation" , "Contributor to plastics industry" , "Substance produced from sap of some plants and trees" , "Viscous substance in some trees" .)