Related Clues:

• ''You're on!'' e.g.
• Chalked item
• Emcee's prompt
• Kind of ''card'' or ''stick''
• It's chalked between shots
• Hand a line?
• Act as a prompter
• Shark's stick
• Tool for a massГ©
• Nod, say
• "Just do it," for one
• Swelling music at the Oscars, e.g.
• Campaign encapsulation
• Words on a card
• Signal to come in