Virtue having reserve of money for head of business's remarkable insight (10)

'remarkable insight' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Maybe you can see an association between them that I don't see?

'virtue having reserve of money for head of business's' is the wordplay.
I cannot quite see how this works, but
'reserve' could be 'fund' (I have seen 'Reserve of money ' mean 'fund' so perhaps 'reserve' could also mean 'fund') and 'fund' is located in the answer.
'of' could be 'o' and 'o' is present in the answer.
'money' could be 'p' and 'p' is found in the answer.
This explanation may well be incorrect...

Can you help me to learn more?