Rider (6)
'rider' is the definition.
(I know that jockey is a type of equestrian)
This is all the clue.
(Other definitions for jockey that I've seen before include "Manoeuvre for advantage like horse race rider" , "Rider of racehorse" , "A professional horse rider" , "Struggle for position" .)
(Other definitions for easy that I've seen before include "Far from hard" , "... Rider (film)" , "Tranquil" , "Effortless, uncomplicated" , "Like a walk in the park?" .)