Revolutionary Polish artist's upset fund manager (6)
I believe the answer is:
bursar
'fund manager' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'revolutionary polish artist's upset' is the wordplay.
'revolutionary' shows that the letters should be reversed in order.
'polish' becomes 'rub' (polish meaning rub to make shiny).
'artist's' becomes 'RA's' (Royal Academician, member of Royal Academy of Arts).
'upset' says the letters should be written in reverse.
'rub' in reverse letter order is 'bur'.
'ras' back-to-front is 'sar'.
'bur'+'sar'='BURSAR'
Can you help me to learn more?
(Other definitions for bursar that I've seen before include "School finance director" , "College financial officer" , "College finance officer" , "The treasurer at a college or university" , "Treasurer of educational establishment" .)