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

Crossword clues for A big league: Abbr. 3 letters:

NAT: A big league: Abbr.
NAT: Big league: Abbr.
NATL: One of the Big Leagues: Abbr.
AMER: Big league: Abbr.
NATS: Big-league players: Abbr.
MGRS: Big-league masterminds: Abbr.