Kind of apple tree (4)

I believe the answer is:

pine

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

I don't understand the rest of the clue.

(Other definitions for pine that I've seen before include "Long - timber" , "Conifer grown for wood" , "type of wood" , "Scots fir" , "A tree to grieve for" .)

I've seen this clue in The Globe and Mail.

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