Related Clues:

• 40-Across, e.g.
• 'On the double!'
• E.R. order
• Immediately, to a surgeon
• P.D.Q. in the I.C.U.
• ER order
• ER command
• Diamond datum
• 'Quickly!'
• Bit of data
• Informational unit
• Pronto, on 'ER'
• ASAP, in the ER
• Pronto, to a doctor
• Sports datum