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

Crossword clues for Grand achievement:

COUP: Grand achievement
FEAT: Grand achievement
NADAL: Career Grand Slam achiever at age 24
NADAL: Tennis champ who achieved the career Grand Slam in 2010
AGASSI: Fifth man to achieve a Career Grand Slam