Related Clues:

• 4-Across, e.g
• Derby entrant
• Livery delivery
• Forty-ounce brand, with '45'
• .45 maker
• Putative pony
• A gunrunner
• Young man inexperienced with a gun
• Horse pistol
• Horse shooter
• Weapon for junior?
• Two officers, one gun
• Young horse - revolver
• Young horse - gun
• Male horse under four years of age