Related Clues:
- Dict. shelfmate
- Something in an env.
- Abbr. on 14-Across
- Abbr. on a business letter
- Memo header
- Ltr. insert
- Abbr. at the top of a memo
- Stamped return env., e.g.
- Abbr. on an order
- Bus. envelope notation
- Env. abbreviation
- Memo heading
- Collier's, for one: Abbr.
- Memo directive
- Abbr. that may precede a colon