Related Clues:

• Hint; prompt
• Nod and wait in order to be heard
• It gets the ball rolling
• Hint — what you're reading is missing line
• Signal to go onstage
• It's shown offstage
• Tapered piece of sports equipment
• Numberless type of ball
• Signal on stage
• Maestro's wave of a baton, say
• Signal for a performer
• Signal Potter uses?
• What a prompter provides
• Line that an actor waits to hear
• Regularly crude sign