Chris —, 1956 Olympic 3,000m steeplechase gold medallist (7)

I believe the answer is:

brasher

(Other definitions for brasher that I've seen before include "Athlete Christopher" , "our 1/4 Across [GOLD MEDALLIST] in 1956" , "more crudely self-assertive" , "more arrogant" .)

I've seen this clue in The Mirror.

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