Expert shooting, maybe?

I believe the answer is:

star

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'expert' is the definition.
(star is a kind of expert)

I can't explain the rest of the clue.

(Other definitions for star that I've seen before include "chamber" , "For example, Marilyn Monroe" , "Five- or six-pointed figure" , "Distant sun" , "Astronomer - dreamer" .)

I've seen this clue in the Evening Standard.

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