Old vicar returning deliveries (4)
I believe the answer is:
over
'deliveries' is the definition.
(I've seen this before)
'old vicar returning' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'vicar' becomes 'rev'.
'returning' shows that the letters should be reversed in order.
'rev' backwards is 'ver'.
'o'+'ver'='OVER'
(Other definitions for over that I've seen before include "Division of play in cricket" , "Action far more drastic than necessary" , "Round of six bowls in cricket - then it's finished" , "Excessive" , "Finished-up -left" .)