Related Clues:
- Not the sort of ring one might expect from 16 down
- Twas herself that had been 16 down - next thing to a nut
- Circular rubber gasket
- Metal ring
- Cleaner ring to prevent leaks perhaps
- It tightens a nut in a cleaning machine
- Metal ring - cleans clothes
- Rubber ring securing joint
- Flat ring as seal
- 23-Across product
- Letter-shaped bit of NASA equipment
- Garden hose gasket
- Tap seal
- Flattened ring that keeps nuts secure
- Seals pipeline to old syndicate