Plant said never to come out (5)

I believe the answer is:

cumin

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'plant' is the definition.
(cumin is a kind of plant)

I cannot understand how the rest of the clue works.

(Other definitions for cumin that I've seen before include "Aromatic seeds used as condiment" , "Aromatic seeds used in cooking" , "relief from wind" , "Curry powder ingredient" , "seasoning" .)

I've seen this clue in the Evening Standard.

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