Trim; a tree (6)

I believe the answer is:

spruce

I believe this clue is a double definition.

'trim' is the first definition.
(synonyms)

'a tree' is the second definition.
(I know that Spruce is a type of Pinaceae)

(Other definitions for spruce that I've seen before include "Smart, trim" , "Natty as a tree" , "Evergreen pyramid-shaped tree" , "Neat and tidy like tree" , "Neat and dapper tree" .)

I've seen this clue in The Guardian, the Newsday, The Telegraph and the Universal.

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