Settle the bill for making wages better (3,2)
I believe the answer is:
pay up
'settle' is the definition.
(paying up is a kind of settling)
'the bill for making wages better' is the wordplay.
I cannot quite understand how this works, but
'wages' could be 'pay' (I've seen this before) and 'pay' is present in the answer.
The remaining letters 'up' is a valid word which might be clued in a way I don't understand.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for pay up that I've seen before include "Discharge a debt" , "Give me the money!" , "Settle" , "Hand over the money" .)