Insatiable desire for wealth (7)
I believe the answer is:
avarice
'insatiable desire for wealth' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for avarice that I've seen before include "Stinginess" , "Extreme greed for wealth" , "Cupidity" , "Rapacity" , "One of seven deadly sins" .)