Joker finally made payment (4)
I believe the answer is:
wage
'payment' is the definition.
(wage is a kind of payment)
'joker finally made' is the wordplay.
'joker' becomes 'wag' (I've seen this before).
'finally' says to take the final letters.
The final letter of 'made' is 'e'.
'wag'+'e'='WAGE'
(Other definitions for wage that I've seen before include "Money earned" , "Salary" , "Engage in (war?)" , "Engage in - pay" , "Reward for work" .)