Related Clues:

• TVA project
• Gardiner, for one
• It retains water
• Keep from running
• Thoroughbred's mother
• Leave it to beavers
• Beaver barrier
• Block the flow
• Beaver's oeuvre
• Line at the dentist's office?
• Flow blocker
• Water stopper
• Beaver project
• Embroidery filaments
• Dental thread