Related Clues:

• Invoice, more than twice as high
• Seems the invoice is more than twice as high
• More than twice as high, by the sound of it (6)
• Little more than twice as high, by the sound of it
• 'More than twice as high, by the sound of it (6)'
• One of the clefs
• This singer, given a chance, could win a fortune
• It's put on by a better singer
• Inert compound, which is made up of three parts
• Quake when losing millions in bet
• Quake, losing heart with a high-pitched voice
• A singer in a trio?
• Suitable voice for a high score?
• Three times - a boy soprano
• Triple - high-pitched