Time the bitter saga ends (3)
I believe the answer is:
era
'time' is the definition.
(era is a kind of time)
'the bitter saga ends' is the wordplay.
'ends' says to take the final letters.
The last letters of 'the bitter saga' are 'ERA'.
(Other definitions for era that I've seen before include "Important date" , "Specific time" , "Stage" , "Age marked by a distinctive character" , "Eon" .)