Prepared to make money (5)
I believe the answer is:
ready
This clue is a triple definition!
'prepared' is the first definition.
(associated in meaning)
'to make' is the second definition.
('ready' can be a synonym of 'make')
'money' is the third definition.
(ready can informally mean cash)
(Other definitions for ready that I've seen before include "All set to go" , "Prepare money" , "Primed" , "Fully prepared" , "rough companion" .)