Related Clues:

• "On the double!"
• Order heading
• Initials for the impatient
• Promptness prompter
• Earliest
• "And hurry!"
• Memo imperative
• ". . . and make it snappy!"
• Pronto, in a memo
• Quickly, initially
• Shortly, shortly
• Primarily
• Impatient initials
• "... and make it fast!"
• Kin of PDQ