Rider put garment on display (10)
I believe the answer is:
showjumper
'rider' is the definition.
(showjumper is a type of horse rider)
'garment on display' is the wordplay.
'garment' becomes 'jumper' (jumper is a kind of garment).
'on' means one lot of letters go next to another.
'display' becomes 'show' (synonyms).
'jumper' after 'show' is 'SHOWJUMPER'.
'put' is the link.
(Other definitions for showjumper that I've seen before include "one tackling obstacles in due course" , "equestrian" , "Sportsperson penalised for a refusal" , "Sportsman" , "performer in event" .)