Classic horseman! (7)
I believe the answer is:
centaur
This could be a double definition.
'classic' is the first definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'horseman' is the second definition.
(half horse, half man)
Can you help me to learn more?
(Other definitions for centaur that I've seen before include "Mythical creature, half-man, half-horse" , "Mythical equine creature" , "Fabulous horse-man" , "Mythical beast, half horse and half man" , "Mythic man-horse" .)