Task, job (5)
I believe the answer is:
chore
This clue is a double definition.
'task' is the first definition.
(I know that task can be written as chore)
'job' is the second definition.
(I know that job can be written as chore)
(Other definitions for chore that I've seen before include "Onerous task" , "Tedious routine task" , "Unpleasant task" , "A household or routine task" , "Mundane task" .)