Related Clues:

• Heater feature
• Form spirals
• Slinky, basically
• Mattress feature
• Emulate a snake in the grass
• It's all wound up
• DNA shape
• Rattler's posture
• Slinky's shape
• Stamp purchase, perhaps
• Wind (up)
• Mattress part
• Rattler's pose
• Spiral shape
• Postage purchase