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

Crossword clues for Some whistle-blowers, briefly:

REF: Certain whistle-blower, briefly
REF: Rink whistle-blower, briefly
REFS: Some whistle-blowers, briefly
NSA: Former employer of whistle-blower Reality Winner, briefly