Tree providing leafy cover (3)

I believe the answer is:

fig

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

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

(Other definitions for fig that I've seen before include "Seed-packed fruit" , "This leaf may conceal nudity in art" , "Tree whose leaf may conceal nudity" , "Sticky fruit" , "something unimportant" .)

I've seen this clue in the Evening Standard.

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