Related Clues:
- Encl. with a submission
- Part of SASE: Abbr.
- Letter getter
- Address abbr.
- Letter carrier?: Abbr.
- Post delivery: Abbr.
- Part of many addresses
- FedEx won't deliver to it
- Part of SASE
- Part of SASE (Abbr.)
- It may have a window: Abbr.
- It may get stuffed: Abbr.
- Part of many a bus. address
- P.O. item
- Ltr. carrier