Crossword clues for the word: GRANDDUKE The word GRANDDUKE has appeared as an answer to at least 3 crossword clues on different crossword puzzles. Crossword clues for GRANDDUKE Showing 1 to 3 of 3 results Clue(s) £1000 outstanding? King’s called in nobleman Positive response to composer Ellington for becoming the leader of Luxembourg? Title of Luxembourg's leader