Related Clues:

• Rider's handful
• Restraining influence
• Spaghetti, for one
• Restriction
• Seat belt restraint
• Leather strap
• It may stop some horseplay
• Rider's strap
• Jock's strap
• Smarty Jones' control
• Curb, with 'in'
• Harness gear
• It's straight from the horse's mouth
• Jockey's strap
• Subway train convenience