Related Clues:

• Roller coaster feature
• Slinky, basically
• Screw thread, e.g.
• Mattress feature
• Emulate a snake in the grass
• It's all wound up
• Rattler's posture
• Auger shape
• Slinky's shape
• Stamp purchase, perhaps
• Wind (up)
• What well-thrown 44-Across do
• Montana pass?
• Spring wind?
• Mattress part