Related Clues:

• Spring, essentially
• Snake's posture, sometimes
• Rattlesnake's shape
• Film purchase
• Yaw relative, on an aircraft
• What to do with the punches
• Parker House, e.g.
• Sushi serving
• Take turns?
• 'Heads will ___!'
• Hamburger holder
• 'Shake, Rattle, and --'
• Emulate a snake
• Form rings
• Slinky, essentially