Riding horse (5)
'riding horse' is the definition.
(steed is a kind of riding horse)
This is all the clue.
(Other definitions for steed that I've seen before include "Horse, mount" , "(Poetic) horse" , "A mount (poet.)" , "Trusty horse" , "Swift horse" .)
'riding horse' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for mount that I've seen before include "Climb - Everest, for example" , "stage" , "Horse; climb" , "Get on - horse" , "Produce - horse" .)