Related Clues:

• Blink of an eye, briefly
• Half a mo
• Constrained
• "Hey, wait a ___!"
• Champagne descriptor
• Wine descriptor
• ''Just a ___!''
• Mo
• Word on wine bottles
• 'Hold on for just a ___!'
• Tiny time
• "Hold on a __!"
• With 39-Across, instant
• You might ask a waiter to give you one
• Govt. agency since '34