Other crossword clues for answer "KNOCKKNOCK"KNOCKKNOCKRap jokeStart of a jokeStart of many a corny jokeMany a joke's start, either part of which is synonymous with the ends of 17-, 25-, 37- and 52-AcrossVisitor's second attemptQuestion-answer game of the good old days.Kind of joke1940 cartoon in which Woody Woodpecker debutedClassic joke startBeginning of many jokesStart of a rap joke?Can I come in?First line of some jokes