It grows in entree (4)

I believe the answer is:

tree

I'm a little stuck... Click here to teach me more about this clue!

'it grows' is the definition.

'entree' is the wordplay.
'TREE' is hidden within the letters.
But, I am uncertain how the hidden word is indicated.

'in' is the link.

Can you help me to learn more?

(Other definitions for tree that I've seen before include "Be up a .... to be in difficulties" , "Recently named grouping of rogue states" , "Oak, for example" , "Plane possibly" , "Eg, laburnum" .)

I've seen this clue in The Mirror.

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