Where money's concerned you've got to hand it to him (5)
I believe the answer is:
payee
'concerned you've got to hand it to him' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'where money's' is the wordplay.
I cannot quite understand how this works, but
'money' could be 'pay' (I've seen this in other clues) and 'pay' is found within the answer.
The remaining letters 'ee' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for payee that I've seen before include "One given money" , "The one to whom cheque is made out" , "One receiving money" , "Person getting the money" , "To whom cheque is written" .)