Related Clues:

• Cause of a traffic tie-up
• Emulate a tide
• Do the butterfly
• Regress
• Flow back
• Shrink
• One way to travel by sea
• ___ tide
• Dwindle down
• Subside, as the sea
• Windblown snow pile
• Consolidate
• Stroke, stroke, stroke...
• Low point
• Form a union