Crossword clues for the word: GREWUP The word GREWUP has appeared as an answer to at least 9 crossword clues on different crossword puzzles. Crossword clues for GREWUP Showing 1 to 9 of 9 results Clue(s) Abandoned one's Peter Pan syndrome Attained maturity Matured Started acting responsibly Stopped acting immaturely Stopped acting like a child Stopped acting like a kid Stopped being infantile Turns up, we're briefly guarded by dog - is that a sign one has matured?