Related Clues:

• Sound-speed number
• Speed-of-sound word
• Factor in determining terminal velocity
• Buzzkill
• Camp clothing?
• __ race
• __ 1: speed of sound
• ___ 5 (Speed Racer's car)
• Pull, caveman style
• Ernst of sound-barrier fame
• Speed of sound
• Boring situation
• Puff on a cigarette
• It's no fun at all
• RuPaul's costuming