1) Clean with Liquid-Plumr 2) Clear 3) Disengage 4) Do a drain job 5) Employ a snake 6) Free 7) Free of blockage 8) Get the flow to go 9) Pour Drano in 10) Put a snake in a drain 11) Remove a blockage from 12) Remove stoppages 13) Run a snake through 14) To have a blockage removed 15) To remove a blockage from 1) Open 
• (v. t.) To disencumber of a clog, or of difficulties and obstructions; to free from encumbrances; to set at liberty.
To remove an obstructing object
To remove an obstructing object
[v] - become or cause to become unobstructed