Related Clues:

• Block cross, as a result
• Block, beaver-style
• Create an obstruction, in a way
• Completely block
• Block to keep water back? That would be mad
• Obstruct, as a river
• Obstruct a river
• Plug, say
• Obstruct, as a stream
• Prevent from running
• Stop dead: cougar to the left
• Block, like a river