Cowboy clamoured, refusing duel, shot in bar? (5)
I believe the answer is:
carom
'shot in bar?' is the definition.
'carom' can be an answer for 'shot' (carom is a kind of shot). I am not sure about the 'in bar?' bit.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for carom that I've seen before include "Cannon in billiards" , "Billiards shot" , "billiard shot" , "Form of billiards with no pockets" , "rebound" .)