Pristine plant? (4)
I believe the answer is:
mint
I believe this is a double definition.
'pristine' is the first definition.
(thesaurus)
'plant?' is the second definition.
(mint is a kind of plant)
(Other definitions for mint that I've seen before include "Where money coins are made" , "Large sum of money" , "Freshly made" , "Grown in the herb garden" , "Plant - in perfect condition" .)