Crossword clues for the word: OPPER The word OPPER has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for OPPER Showing 1 to 6 of 6 results Clue(s) """Happy Hooligan"" cartoonist" "Actor Dennis, to a Cockney" Alphonse and Gaston's creator Cartoonist Frederick Creator of Happy Hooligan. Happy Hooligan's creator