Related Clues:

• Make certain
• Rush-job acronym
• 'Get a move on!'
• ''Quickly!'' acronym
• Get going
• Word on an urgent message
• Without delay, in a memo
• 'Right away!'
• ''On the double!''
• Begin immediately
• Become active
• 'I dare you!'
• Posthaste, briefly
• '___ it!' (exhortation)
• Letters akin to P.D.Q.