Tree yielding syrup (5)
I believe the answer is:
maple
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tree yielding syrup</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for maple that I've seen before include "Canadian national tree" , "Emblematic tree of Canada" , "Syrup-yielding tree" , "Tree: its leaf the Canadian emblem" , "Tree with winged fruits" .)