Related Clues:

• “___, cryptologist!”
• Make a start, and what you might do to the ends of the starred answers
• Apt command to an 18-, 28- or 47-Across
• 'Hurry up!' to an omelet chef?
• 'What are you waiting for?'
• Achieve great start
• Good film with great start
• Start making jokes -- or omelettes?