The tree is not so young (5)

I believe the answer is:

elder

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

I don't understand how the remainder of the clue works.

(Other definitions for elder that I've seen before include "Woody shrub - used for wine, tea or cordial" , "Senior churchperson" , "Character of church" , "More ancient" , "Tribal advisor" .)

I've seen this clue in The Irish News.

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