Crossword clues for the word: FOSS The word FOSS has appeared as an answer to at least 6 crossword clues on different crossword puzzles. Crossword clues for FOSS Showing 1 to 6 of 6 results Clue(s) """Echoi"" composer" """Time Cycle"" composer Lukas ___" American pianist Lukas Castle moat Composer Lukas Conductor Lukas ___