Related Clues:

• Male singing voice
• Male singer with high-pitched voice
• High male singing voice like Pavarotti
• Around six, the seer may alter the original
• It's a bit high to be invoiced like this
• X or invoice?
• Sounds like what you might have to pay so high a fellow
• He will get high, by the sound of it
• Below the treble
• Perhaps invoices with a slot
• He gets high, by the sound of it
• Note how deep these girls get
• Thus one might get to 9 down on for amortise
• There's nothing in the last that makes them so low, by the sound of them
• X or on high, by the sound of it (5)