Tree exudation (5)
I believe the answer is:
resin
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tree exudation</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 resin that I've seen before include "hashish, say" , "Rinse out this substance from trees" , "Tree gum" , "Unprocessed pine secretion" , "Lac" .)