Crossword clues for the word: ONEUPON The word ONEUPON has appeared as an answer to at least 5 crossword clues on different crossword puzzles. Crossword clues for ONEUPON Showing 1 to 5 of 5 results Clue(s) Having an advantage Leading by a single point (3 wds.) Slightly ahead of Slightly ahead of, in a game (3 wds.) Took the trophy