Related Clues:

• High time
• Shriek
• "Gimme a C!" e.g.
• Cacoph-ony
• Cheerleader's forte
• Shout
• Kipling's 'Gunga ___'
• A lot of noise
• Speak up, really
• 'Bam!'
• Strident sound
• Sidelines cheer
• Thunderous sound
• Welter of sound
• Trumpet