Athlete on a rink (3-6)
I believe the answer is:
ice-skater
'athlete on a rink' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ice-skater that I've seen before include "Person gliding on frozen water" , "One gliding over rink" , "Dean for one" , "Winter sportsperson" , "Torvill or Dean, say" .)