One in a contest of speed (5)
I believe the answer is:
racer
(Other definitions for racer that I've seen before include "someone driving very fast?" , "Fast mover" , "Perhaps 16 [SCRAMBLER]" , "Athlete" , "American snake" .)
I believe the answer is:
racer
(Other definitions for racer that I've seen before include "someone driving very fast?" , "Fast mover" , "Perhaps 16 [SCRAMBLER]" , "Athlete" , "American snake" .)