Prosperous, wealthy (8)
I believe the answer is:
affluent
I believe this clue is a double definition.
'prosperous' is the first definition.
(I've seen this in another clue)
'wealthy' is the second definition.
(I know that wealthy can be written as affluent)
(Other definitions for affluent that I've seen before include "Well-off" , "Well off, having plenty of money" , "Well-to-do, wealthy" , "Well-to-do, got lots of money" , "Flute fan may be wealthy" .)