To put the finishing touch, having money left to (3,2,3)
I believe the answer is:
cap it all
'to put the finishing touch' is the definition.
I know nothing about this answer so I cannot tell whether this works.
'money left to' is the wordplay.
I cannot really see how this works, but
'money' could be 'capital' (I've seen this before) and 'capital' is found in the answer.
'left' could be 'l' (common abbreviation) and 'l' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'having' is the link.
Can you help me to learn more?
(Other definitions for cap it all that I've seen before include "Climax" , "Surpass or outdo something" .)