Came to an end (6)
I believe the answer is:
ceased
'came to an end' is the definition.
('cease' can be a synonym of 'come to an end')
This is the entire clue.
(Other definitions for ceased that I've seen before include "Finished" , "Came to an end" , "Terminated" , "Came to a close" , "Stopped, quitted" .)