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

Crossword clues for Kaufman's collaborator:

HART: Kaufman collaborator
EDNA: ___ Ferber, Kaufman collaborator
HART: Kaufman's collaborator
MOSSHART: Kaufman's collaborator
MOSSHART: Collaborator with Kaufman