Answer: unstops

AnswerCrossword Clue
UNSTOPSOpens, as a bottle
UNSTOPSPulls the plug on
UNSTOPSClears, as a drain
UNSTOPSDe-clogs
UNSTOPSOpens up, as a drain
UNSTOPSClears, as clogs
unstopsto remove the stopper from
unstopsUNSTOP, to remove a stopper from
unstopsto draw out the stops of (an organ)
unstopsto free from any obstruction; open