Could be a hunter with a gun (8)

I believe the answer is:

repeater

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'gun' is the definition.
(I know that repeater is a type of firearm)

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for repeater that I've seen before include "Timepiece that strikes the hours" , "Burp" , "Gun firing several shots" , "A salesman" , "One keeps saying" .)

I've seen this clue in the Evening Standard.

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