Related Clues:

• Sound issued with an arched back, perhaps
• Let off a little steam
• Former draft agcy.
• Bad sound when you don't have a spare
• Recruiting org.
• Adder alarm
• Indication of tire trouble
• Air-leak sound
• Old draft org.
• Deflationary sound
• Sound of crowd disapproval
• "Boo" accompaniment
• Org. dodged by draft dodgers
• Bad sound for a hot air balloonist
• Popped tire sound