Crossword Genius

Lad's badge (anag) – one of two on horseback (9)

Ross

I believe the answer is:

saddlebag

(Other definitions for saddlebag that I've seen before include "Storage for riders" , "Rider's pouch" , "Attachment to bike" , "Container for a cyclist or horse-rider" , "It's attached behind on a bike" .)

I've seen this clue in The Guardian.
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