A long tree? (4)

I believe the answer is:

pine

I believe this clue is a double definition.

'a long' is the first definition.
(thesaurus)

'tree?' is the second definition.
(pine is a kind of tree)

(Other definitions for pine that I've seen before include "Conifer grown for wood" , "Thirst" , "Kind of needle" , "Mope; tree" , "Long for the conifer?" .)

I've seen this clue in the Evening Standard.

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