Crossword clues for A "Tonight Show" host 4 lettersAnswerClueALLEN'50s "The Tonight Show" host SteveSTEVEALLENOriginal "Tonight Show" hostJAYLENO*"The Tonight Show" host after Johnny CarsonALLENFirst "Tonight Show" hostJACKPAARTonight Show host before CarsonRACIALCARSONOld 'Tonight Show' host studying ethnic groups?OBRIENTonight Show hostKATIECOURICOnly person to guest-host "The Tonight Show With Jay Leno"STEVEAllen who hosted "The Tonight Show"KERMIT'79 "Tonight Show" guest hostSTEVEWith 58-Across, first host of "The Tonight Show"COURICOnly guest host in the 21 years of Leno's "The Tonight Show"