Related Clues:

• Roar
• Cry like a banshee
• Loudspeaker sound (and a letter bank for 60-Across)
• A great time or great noise
• Sound of a siren
• Cry like a baby
• Sob loudly
• Sound like a siren
• Big bang
• Haunted house sound
• Bellow
• Banshee's noise
• Great time
• Traffic jam noise
• Ululate