Unoccupied job (7)
I believe the answer is:
vacancy
'unoccupied job' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for vacancy that I've seen before include "Unoccupied situation" , "Unoccupied state, job or apartment" , "Unoccupied post" , "Lack of consideration" , "An opening, job or apartment" .)