Possible Clues:

• Quakers do this mass in soprano voice
• Quake in one's shoes, having put millions into bet
• Quiver from maiden grabbed by chorister
• How grand to be in thrice such a shake
• More than twice about a thousand? that'll shake you
• A high voice in a male will quiver
• Narrow band for arrows around top of my quiver
• First bit of music - singer curbs that sign of nerves
• Multiply by three, divide by a thousand - and shudder
• Betray nerves, having sunk millions into multiple bet