Emblematic tree of Canada (5)
I believe the answer is:
maple
'emblematic tree of canada' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for maple that I've seen before include "Type of syrup" , "Canadian flag leaf" , "Tree: its leaf the Canadian emblem" , "Tree associated with Canada" , "Its leaf is the emblem of 8 down" .)