Officially, his job is remunerative (9)
I believe the answer is:
paymaster
'officially his job is remunerative' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
This is the entire clue.
Can you help me to learn more?
(Other definitions for paymaster that I've seen before include "Official dealing with wages" , "Salary official" , "Official handing out money to troops or workers" , "One controlling through money" , "I hand out bread" .)