Sycamore, eg (5)
I believe the answer is:
maple
'sycamore eg' is the definition.
(I know that Acer pseudoplatanus parent taxon maple)
This is all the clue.
(Other definitions for maple that I've seen before include "----- leaf: symbol of Canada" , "Canadian flag leaf" , "Tree with winged fruits" , "Its leaf is the emblem of 8 down" , "Ample sort of tree" .)