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

Crossword clues for Signal for a scramble. 5 letters:

ALERT: Signal for a scramble.
REDALERTS: Signals to scramble
REDALERT: Signal to scramble
GARBLE: Scramble, as a signal
AIRALERT: Signal that starts a scramble