Sentence:  Charlie Marble was back and forth on several occasions , first to confer with Andy on the advisability of cancelling the Las Vegas engagement - they decided it was wise - and later to announce that a prominent <WSD>comedian</WSD> , also an agency client , had agreed to fill the casino 's open date . 
Meaning of the word marked with <WSD> tags:  a professional performer who tells jokes and performs comical acts