Sits in the poorest seats (5)
I believe the answer is:
rests
'sits' is the definition.
(resting is a kind of sitting)
'in the poorest seats' is the wordplay.
'in' indicates the answer is hidden within the clue.
'RESTS' can be found hidden inside 'poorest seats'.
(Other definitions for rests that I've seen before include "Reposes" , "Takes one's ease" , "Musical pauses" , "Pauses; relaxes" , "Relaxes; supports" .)