Sitting around (4)
I believe the answer is:
idle
'sitting around' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for idle that I've seen before include "Inert; lazy" , "Unoccupied (time); run (engine) slowly" , "Good-for-nothing" , "Not in action or at work" , "Dormant" .)