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

Crossword clues for Keep a close eye on:

WATCHLIKEAHAWK: Keep a close eye on
MONITOR: Keep a close eye on
NOPEEKING: Keep your eyes closed until I say
NOPEEKING: Keep your eyes closed!
CPAS: They keep a close eye on figures