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

Crossword clues for Central theme:

GIST: Central theme
FAME: Central theme of "A Star Is Born"
CYCLE: Literary works on a central theme
VALENTINESDAY: Central theme of this puzzle
MOTIF: Central theme
CORE: Central theme
TIC: With 50 and 55 Across, the "central" theme
COLLEGE: What's central to each of the theme entries
HOMOPHONES: They sound more similar than they look ... and are central to this puzzle's theme