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

Crossword clues for Ad- -- (improvise):

LIBS: Ad-___ (improvises)
LIB: Ad-___ (improvise)
LIB: Ad-__: improvise
LIBS: Ad __: improvises
LIBS: Ad ___ (improvises on the stage).
LIB: Ad- -- (improvise)