Munificent, open-handed (8)
I believe the answer is:
generous
I believe this clue is a double definition.
'munificent' is the first definition.
(similar in meaning)
'open-handed' is the second definition.
(I've seen this before)
(Other definitions for generous that I've seen before include "Showing largess" , "Ample" , "Charitable" , "Princely" , "Munificent; liberal" .)