Related Clues:

• Reply courtesy, briefly
• Abbr. at the bottom of a letter
• Ed.'s request
• Postal letters?
• Enclosure with a MS.
• Envelope abbr.
• Writer's Market abbr.
• Postpaid encl.
• Env. extra
• Return mailer: Abbr.
• Letter encl.
• Inclusion with a MS.
• Abbr. on an envelope
• Returned MS holder
• Letter accompanier: Abbr.