Related Clues:

• Grouper, e.g.
• Voice below baritone
• Bigmouth, for one
• Clef below middle C
• Spot for a rock band's logo
• He hits low pitches
• Barbershop necessity?
• Talent contest prop
• Source of low pitches?
• Wide-mouthed fish
• Talent show prop
• Barry White, notably
• It's deep
• Deep end?
• Sound that ends an act