Related Clues:

• Greeting sons in urgent whisper
• Escaping-air sound
• Let villainous play-actor have it, hiding under Memphis sycamore
• Protested org. of the 1960s
• Leakage evidence
• Cobra sound
• Org. that makes draft choices
• Audible disapproval in church is sacrilegious
• Fryolator sound
• Leaking sound
• Butter-on-hot-griddle sound
• "Boo!" alternative
• Busted tirade sound, perhaps
• Sound of steam
• Sound from a radiator