Save report for the other end of the gun (4)
I believe the answer is:
butt
'the gun' is the definition.
(thesaurus)
'save report for' is the wordplay.
'save' becomes 'but' (I've seen this in other clues).
'report for' shows a homophone (sound like).
'but' is a homophone of 'BUTT'.
'the other end of' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for butt that I've seen before include "Blunt end - target of ridicule - hit with the head - cask - US backside" , "couple of hogsheads?" , "bum..." , "Bottom end of a rifle" , "ram > end" .)