Related Clues:

• Clear
• Open
• Clear, as a drain
• Clear the drain
• Clear a drain
• Pull the plug?
• Clear of clogs
• Use Liquid-Plumr, say
• Use a plunger
• Open, as a dam
• Free from obstruction
• Clear what one puts on
• Pull a cork out of
• Let drain, as a sink
• Open a damaged sunroof