Coventry's lady rider — but not in dressage event! (6)
I believe the answer is:
godiva
This might be a double definition.
'coventry's lady' is the first definition.
(I've seen this before)
'rider but not in dressage event' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for godiva that I've seen before include "Peeping Tom looked at her riding through Coventry" , "legendary rider" , "Coventry's naked rider" , "Coventry's Lady" , "who rode bareback?" .)