Related Clues:
- RSVP inclusion, often
- Automobile engineer's org
- Wedding invitation encl
- Encl. with an invoice
- What ''encloses'' the four longest answers
- Pollster's enc
- Motor oil rating org
- Postpaid enclosure: Abbr
- Mailer in a mailer, briefly
- M.S. enclosure
- Common RSVP enclosure
- Posting facilitator, for short
- Society of Auto Engs
- Ed.'s requirement
- Return-mail courtesy: Abbr