Related Clues:

• Signal
• What an actor waits for
• It may be missed onstage
• Bandleader's cue
• Theatrical signal
• Feed lines to
• Bandleader's call
• Pool ball with no number
• Starting signal
• 'The Hustler' prop
• Directive to a band
• Stage prompt
• Actors wait for it
• Mnemonic device
• Actor activator