Related Clues:
- Beaver work
- Gardiner or Mica
- River block
- It may be forming at the mouth
- China's Three Gorges, for one
- Area around the mouth
- Greek triangle
- It checks the water
- Structure whose name might make kids giggle (3)
- Keep from flowing
- Triangular letter
- Buildup around the mouth
- Mouth locale
- Hydroelectric power site
- Pedigree listing