Related Clues:

• Floor
• 'Holy moly!'
• Reply courtesy, briefly
• Flabbergast
• Ed.'s request
• Enclosure with a MS.
• Writer's Market abbr.
• Postpaid encl.
• 'Cool!'
• 'Holy cow!'
• Stun
• Return mailer: Abbr.
• Thrill
• 'Holy mackerel!'
• Letter encl.