Old vicar coming back no more (4)
I believe the answer is:
over
'no more' is the definition.
(over can mean finished or done)
'old vicar coming back' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'vicar' becomes 'rev' (short for reverend).
'coming back' is a reversal indicator.
'rev' written backwards gives 'ver'.
'o'+'ver'='OVER'
(Other definitions for over that I've seen before include "Division of play in cricket" , "Ancient history" , "A bowler's round in cricket" , "Exceeding - finished" , "Past, surplus" .)