Classic location with English rider on order (5)
I believe the answer is:
epsom
'classic location' is the definition.
The definition suggests a singular noun which matches the answer.
'english rider on order' is the wordplay.
'english' becomes 'E' (abbreviation).
'rider' becomes 'PS' (a rider is a clause added to a contract, so a P.S.).
'on' is a charade indicator (letters next to each other).
'order' becomes 'om' (Order of Merit).
'e'+'ps'+'om'='EPSOM'
'with' is the link.
Can you help me to learn more?
(Other definitions for epsom that I've seen before include "Poems about English racing venue" , "& 5 Purgative medicine" , "Home to the Derby and the Oakes" , "can have horses" , "track in Surrey" .)