Crossword Genius

Poplar (5)

Ross

I believe the answer is:

aspen

'poplar' is the definition.
(I know that aspen is a type of poplar)

This is all the clue.

(Other definitions for aspen that I've seen before include "Tree that quivers" , "Colorado ski resort - tree" , "The tree that shivers in the slightest wind" , "quill-like?" , "One trembling" .)

I've seen this clue in the Evening Standard and The Mirror.
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