Switch setting (3)
I believe the answer is:
off
'switch setting' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for off that I've seen before include "(Of food) no longer fresh" , "Away, or beginning to decay" , "Far from fresh" , "Complete (6,3) - See 14" , "Not working - started" .)