Related Clues:

• Memo heads-up
• Meant for, for short
• ''It's for,'' for short
• Cover sheet abbr
• Directed to: Abbr
• E-mail subject-line abbr
• Letter abbr
• Mailing label abbr
• Cause of an env. bulge
• Ltr.-bottom letters
• Env. router
• "To whom it actually does concern" letters
• "It's for you," on an env
• Ref. wk
• In the env