Crossword clues for the word: SIMPLON The word SIMPLON has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for SIMPLON Showing 1 to 6 of 6 results Clue(s) A high pass in geography Alpine tunnel Famed Alpine pass Most famous of the Alpine tunnels. Noted alpine tunnel Pennine pass or tunnel.