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

Crossword clues for Apple that's inedible:

ADAMS: Inedible apple
CORE: Inedible apple part
MACS: Inedible Apples
ADAM: Namesake of an inedible apple?
IMAC: Apple that's inedible