Finished after hour? Linger (5)
I believe the answer is:
hover
'linger' is the definition.
(I know that linger can be written as hover)
'finished after hour?' is the wordplay.
'finished' becomes 'over' (over can mean finished or ended).
'after' is a charade indicator (letters next to each other).
'hour?' becomes 'h' (abbreviation).
'over' after 'h' is 'HOVER'.
(Other definitions for hover that I've seen before include "Be stationary in the air" , "Remain in the air; linger" , "Remain in one spot in the air" , "Hang around (in air)" , "Remain in one place in the air" .)