Took weed maybe, not mint (4)

I believe the answer is:

used

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

'not mint' is the definition.
(I've seen this in another clue)

I don't understand the remainder of the clue.

(Other definitions for used that I've seen before include "Accustomed - exploited" , "Was treating" , "Utilised" , "That's not new" , "worked unfairly" .)

I've seen this clue in The Guardian.

Want a hint initially instead of a full solution? Install my app