Riding-breeches (8)
I believe the answer is:
jodhpurs
'riding-breeches' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for jodhpurs that I've seen before include "Flared trousers worn with riding boots" , "Trousers for horseback riders" , "Equestrian's garb" , "Horse-riding trousers" , "Riding attire" .)