Winding up very rich (7)
I believe the answer is:
rolling
This clue could be a double definition.
'winding up' is the first definition.
'rolling' can be an answer for 'winding' ('roll' can be a synonym of 'wind'). I am not sure about the 'up' bit.
'very rich' is the second definition.
Can you help me to learn more?
(Other definitions for rolling that I've seen before include "Moving like a wheel" , "-- Stock; -- pin" , "being so drunk?" , "Going round - a type of mill" , "Moving on wheels" .)