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

Crossword clues for '50s scare:

RED: Color of a '50s "scare"
REDS: '50s scare
HUAC: '50s Red Scare gp.
JOEMCCARTHY: Red Scare instigator of the '50s