Athlete - bean (6)
I believe the answer is:
runner
I believe this clue is a double definition.
'athlete' is the first definition.
(type of athlete)
'bean' is the second definition.
(runner bean is a kind of bean)
(Other definitions for runner that I've seen before include "Viable idea" , "Canvas shoe with a rubber sole" , "Type of bean for an athlete?" , "Harrier" , "Participant in a race" .)