Enthusiast pursues vegetable and legume (6)
I believe the answer is:
peanut
'legume' is the definition.
(I know that peanut is a type of legume)
'enthusiast pursues vegetable' is the wordplay.
'enthusiast' becomes 'nut' (nut can mean an enthusiast or fan).
'pursues' is a charade indicator (letters next to each other).
'vegetable' becomes 'pea' (pea is a type of vegetable).
'nut' after 'pea' is 'PEANUT'.
'and' acts as a link.
(Other definitions for peanut that I've seen before include "Eat pun for the hard fruit" , "Common snack" , "Singularly little money" , "Groundnut" , "It ripens in a vine pod underground" .)