Crossword clues for the word: FOSSA The word FOSSA has appeared as an answer to at least 12 crossword clues on different crossword puzzles. Crossword clues for FOSSA Showing 1 to 12 of 12 results Clue(s) "Hollow, as in a bone" Anat. cavity Anatomical pit Bone dent Bone hollow Caesar's ditch Carnivorous mammal of Madagascar resembling an elongated cat Madagascar mammal Madagascar's largest carnivore Pit in a bone Pit: Anat. Small hollow: Anat.