Crossword clues for Abbott and Costello routine.:WHOSONFIRSTAbbott-Costello routine.ONFIRSTWho's ___ ? (Abbott-Costello routine).WHOSTitle word of an Abbott and Costello routineWHOSONFIRSTAbbott and Costello routine.WHOSPart of an Abbott and Costello routineBASEMENWho, What and I Don't Know, in Abbott and Costello's "Who's on First?" routineWHOFirst baseman in an Abbott and Costello routineWHATSecond baseman, in an Abbott and Costello comedy routine
