Related Clues:

• Old draft letters
• Cobra's caution
• Icicle feature
• Snake's comment
• Not a good reception
• Coffeemaker style
• Sound after a pinprick, perhaps
• Reptilian warning
• Worrying sound to a balloonist
• Pressure cooker's sound
• Poor reception?
• Sound from a hot skillet
• Fizzle or sizzle sound
• Bacon sizzle
• Griddle sound