Sound of disapproval having accepting a job (4)
I believe the answer is:
task
'a job' is the definition.
('task' can be a synonym of 'job')
'sound of disapproval having accepting' is the wordplay.
'sound of disapproval' becomes 'tsk' (expression of disapproval).
'having' indicates putting letters inside.
'accepting' becomes 'a' (this could be a standard abbreviation which I don't know about).
'tsk' placed around 'a' is 'TASK'.
(Other definitions for task that I've seen before include "Difficult piece of work" , "Allocate work" , "something to do" , "Job to be done" , "commission" .)