Possible Clues:

• Loops for a rider's feet
• Horsemen put their feet in them
• Make a spurt, Sir, and put your feet in it for them
• Metal loops for rider's feet
• Saddle attachments
• Horseman put his feet in them
• Mixings, by the sound of them, where you may put your foot in it
• Metal loops for a rider
• Riders' foot-rests
• Saddle features