Young player possibly fired (4)

I believe the answer is:

colt

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'young player' is the definition.
(young member of a sports team)

I can't explain the rest of the clue.

(Other definitions for colt that I've seen before include "runner" , "Male horse under four years of age" , "H [HORSE]" , "Type of American revolver" , "Type of revolver and a young horse" .)

I've seen this clue in the Evening Standard.

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