He shouldn't lose his job (6)
I believe the answer is:
keeper
This clue might be a double definition.
'he shouldn't lose' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'job' is the second definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'his' is the link.
Can you help me to learn more?
(Other definitions for keeper that I've seen before include "Zoo or park manager" , "Custodian, steward" , "Goal minder" , "penalties will come my way" , "Zoo official" .)