Prolific, abundant (6)
I believe the answer is:
lavish
I believe this clue is a double definition.
'prolific' is the first definition.
(thesaurus)
'abundant' is the second definition.
(thesaurus)
(Other definitions for lavish that I've seen before include "Extravagant or excessive" , "Lash around Vi is extravagant (6)" , "Unstinting" , "Plentiful, in large quantities like display" , "Luxurious" .)