Coining plant? (4)
I believe the answer is:
mint
'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?" .)