Better method of making money (6)
I believe the answer is:
system
'better method' is the definition.
'system' can be an answer for 'method' (system is a kind of method). I am not sure about the 'better' bit.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for system that I've seen before include "The government" , "Organised structure for arranging or classifying" , "Set of things in a connected whole" , "Arrangement of things working together" , "Body of doctrine - method of procedure" .)