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

Crossword clues for State of being under 21. 6 letters:

NONAGE: State of being under 21.
NSW: State whose capital is 21-Down: Abbr.
ZEROG: Weightless state, and a hint to 21-, 34-, 41- and 54-Across