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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Emcee, at times:

LIVENER: Emcee, at times
TOASTERS: Emcees, at times
INBETWEENACTS: When an emcee fills time
HOPE: Emcee for the Oscars 18 times