Athlete such as Chris Brasher or Ezekiel Kemboi (13)

I believe the answer is:

steeplechaser

(Other definitions for steeplechaser that I've seen before include "Horse in Grand National, for example" , "Racehorse; 13" , "Horse for jump races" , "Horse race participant" , "Competitive runner" .)

I've seen this clue in The Times.

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