Put your finger on how to raise money (5)
I believe the answer is:
touch
'to raise money' is the definition.
(thesaurus)
'put your finger on' is the wordplay.
I cannot really see how this works, but
'on' could be 'to' and 'to' is present in the answer.
This explanation may well be incorrect...
'how' acts as a link.
Can you help me to learn more?
(Other definitions for touch that I've seen before include "To ask for loan" , "Sense; affect" , "Deftness" , "off pitch" , "kiss" .)