Related Clues:

• Rush letters
• Chop chop
• 'Quickly,' quickly
• 'Without delay'
• On the double, briefly
• On the double, initially
• Memo request
• Abbr. of urgency
• ''Make it snappy!''
• Dreaded letters for a procrastinator?
• ''Without delay!''
• Exec's "Fast!"
• Pronto, so to speak
• Memo writer's 'Now!'
• As fast as possible