Related Clues:

• "On the double!"
• Reasons for do-overs
• Order heading
• "Why don't we?"
• Initials for the impatient
• Promptness prompter
• Gives the go-ahead
• Repeated services
• "Why not?"
• Response to "Shall we?"
• "And hurry!"
• Memo imperative
• ". . . and make it snappy!"
• Pronto, in a memo
• Quickly, initially