Abundant, copious (7)
I believe the answer is:
profuse
This clue is a double definition.
'abundant' is the first definition.
(similar in meaning)
'copious' is the second definition.
(I've seen this before)
(Other definitions for profuse that I've seen before include "Plentiful, luxuriant" , "Liberal" , "Overflowing - excessive" , "Plentiful, generous" , "Copious" .)