Save time for the end (4)
I believe the answer is:
butt
'the end' is the definition.
(I've seen this before)
'save time' is the wordplay.
'save' becomes 'but' (I've seen this before).
'time' becomes 't'.
'but'+'t'='BUTT'
'for' acts as a link.
(Other definitions for butt that I've seen before include "Strike with head" , "one ridiculed" , "Blunt end - target of ridicule - hit with the head - cask - US backside" , "rear" , "Person who is a target for ridicule" .)