Maintained time's over (6)
I believe the answer is:
tended
'maintained' is the definition.
(tend can mean to maintain or look after)
'time's over' is the wordplay.
'time' becomes 't' (abbreviation).
'over' becomes 'ended' (over can mean finished or ended).
't'+'ended'='TENDED'
(Other definitions for tended that I've seen before include "Took care of, had certain inclination" , "Had leaning or inclination toward" , "Inclined towards or took care of" , "Inclined or leaned towards" , "Was apt" .)