Related Clues:

• Letter abbr.
• Ref. work
• Bottom-of-letter abbr.
• Freelancer's encl.
• Letters in a letter
• SASE, e.g.
• Postpaid enc.
• Dict. shelfmate
• Something in an env.
• Abbr. on a business letter
• Ltr. insert
• Snail mail enc.
• PO delivery
• Envelope encl.
• Stamped return env., e.g.