Related Clues:

• Prepared for action
• In position
• Poised for action
• Done cooking
• First word of a three-word command
• 'Set?'
• Available now
• With 11-Down, words before "here I come!"
• Well-prepared
• Well prepared
• Prepped
• Poised to perform
• 'Shall we go?'
• Starter's alert
• "All set to go!"