Legendary horseman familiarly talked of racecourse here (9)
I believe the answer is:
leicester
'legendary horseman familiarly talked of racecourse here' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
This is the entire clue.
Can you help me to learn more?
(Other definitions for leicester that I've seen before include "Midland city" , "royal favourite" , "Queen's favourite" , "At Richmond Palace a favourite" , "English cheese, maybe red" .)