Party with no right to show a profit (3)
I believe the answer is:
pay
'show a profit' is the definition.
(I've seen this in another clue)
'party with no right' is the wordplay.
'with no' is a deletion indicator.
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'party' with 'rt' taken out is 'PAY'.
'to' is the link.
(Other definitions for pay that I've seen before include "Profit" , "Earnings" , "Settle up" , "Financial reward" , "Remunerate" .)