Related Clues:

• In very short order
• Express letters?
• ''... and make it fast!''
• 'Stat' in memos
• Like Poe's bug
• 'Yesterday!'
• Order request
• 'Quick!'
• Pronto!
• "On the double!"
• Order heading
• Prospector's prize
• Initials for the impatient
• Promptness prompter
• "And hurry!"