About finished (4)
I believe the answer is:
over
I believe this is a double definition.
'about' is the first definition.
(I've seen this before)
'finished' is the second definition.
('over' can be similar in meaning to 'finished')
(Other definitions for over that I've seen before include "Concerning" , "Finished like cricket session" , "Ancient history" , "Finished - across - in excess" , "Excessive" .)