Crossword Genius

Coining plant? (4)

Ross

I believe the answer is:

mint

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

'plant?' is the definition.
(I know that mint is a type of plant)

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

Can you help me to learn more?

(Other definitions for mint that I've seen before include "Fragrant herb" , "A bomb" , "Plant - in perfect condition" , "A tangy sweet or coin-making place" , "Flavour of the money-maker?" .)

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