Related Clues:
- Letter addenda: Abbr.
- Last-min. additions
- They're elementary in NYC
- Good Housekeeping awards
- Tire leak sound
- Closes, as an envelope
- Waterproofs, as a driveway
- Ball-bearing creatures
- E-mail endings, at times
- Waterproofs
- Endings to some letters, for short
- Letter endings: Abbr.
- They're usually under signatures: Abbr.
- Puts a lid on
- Naval acronym