Related Clues:

• Derby racer
• Shetland __: small horse
• Moppet's mount
• Race runner
• Tout's pick
• Express mail carrier?
• Chincoteague equine
• Word with hide or hair
• Stallion
• Gymnastics item
• Old-time transportation
• Pay (up), as a debt
• Kind of trader
• Fork over, with "up"
• Track runner