Related Clues:

• Race entrant
• Express mail carrier
• Fork over, with 'up'
• Carnival ride
• Cart puller
• Express transportation?
• Shetland, for one
• Word with tail or ride
• Type of tail
• Chincoteague creature
• Young horse
• Shetland, e.g.
• Small horse
• Pay, with 'up'
• One-trick ___