Canadian tree (5)
I believe the answer is:
maple
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">canadian tree</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 maple that I've seen before include "Tree whose leaf features on the flag of Canada" , "Emblematic tree of Canada" , "Its leaf is the emblem of 8 down" , "Syrup-yielding tree" , "Tree with syrupy sap" .)