Work you reportedly advanced, becoming rich (7)
I believe the answer is:
opulent
'rich' is the definition.
('opulent' can be similar in meaning to 'rich')
'work you reportedly advanced' is the wordplay.
'work' becomes 'op' (abbreviation for opus).
'reportedly' shows a homophone (sound like).
'advanced' becomes 'lent' (money).
'you' is a homophone of 'u'.
'op'+'u'+'lent'='OPULENT'
'becoming' is the link.
(Other definitions for opulent that I've seen before include "Wealthy, rich" , "Wealthy or luxuriant" , "Rolling" , "Ostentatiously rich" , "Ritzy" .)