Related Clues:
- Substance for closing something tightly
- Substance filling gap to prevent leakage
- Flat ring as seal
- 23-Across product
- Tap seal
- Flattened ring that keeps nuts secure
- Had been close to that woman in Ring
- Rendered sightless
- Joint-sealing ring
- Leak-stopping ring
- Flat metal ring; cleanser
- Cleaner used to be a woman
- Plumber often wants it cleaner
- Eg, Fermat or Napier
- Material stopping leaks