Preside over (a meeting) (5)
I believe the answer is:
chair
'preside over a meeting' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for chair that I've seen before include "Prof's post; meeting leader" , "Seat for one person" , "Top seat of committee" , "Presiding officer" , "Get seat" .)