Settles rises in salary (4,2)
I believe the answer is:
pays up
'settles' is the definition.
(paying up is a kind of settling)
'rises in salary' is the wordplay.
I cannot quite understand how this works, but
'salary' could be 'pay' (synonyms) and 'pay' is found within the answer.
The remaining letters 'sup' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Another definition for pays up that I've seen is " forks out".)