He waits for a job (7)
I believe the answer is:
servant
'job' is the definition.
(I know that servant is a profession)
'he waits' is the wordplay.
I cannot really understand how this works, but
'he' could be 'van' and 'van' is found in the answer.
The remaining letters 'sert' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'for a' is the link.
Can you help me to learn more?
(Other definitions for servant that I've seen before include "Worker in household" , "Perhaps chauffeur" , "Housekeeper" , "Page, say" , "Vest ran (anag)" .)