Related Clues:

• Env. inside an env., e.g.
• Item in an env.
• 8 1/2 x 11 in. size
• It's in an env.
• Delta, for one: Abbr.
• Ref. wd.
• Something sent with a ltr.
• Env. attachment
• Epistle (abbr.)
• Copier paper size: Abbr.
• Check, perhaps: Abbr.
• Legal alternative: Abbr.
• It's added to an env.
• Unsolicited MS., perhaps
• Env. add-in