Crossword clues for the word: CSF The word CSF has appeared as an answer to at least 4 crossword clues on different crossword puzzles. Crossword clues for CSF Showing 1 to 4 of 4 results Clue(s) "What the brain ""floats"" in (abbr.)" Brain juice?: Abbr. Liquid in the brain (abbr.) Water in the brain: Abbr.