Related Clues:

• Power sources
• Clunky shoes
• Some four-footed parents
• Hoover and others
• Four-footed moms
• Plumbing problems
• Wooden shoes
• Roosevelt and Hoover
• Keeps from happening
• River structures
• Footwear that may rot
• Goes up against
• Makes a mess of
• Some four-footed mothers
• Emulates beavers