Mackerel Crossword Clue Answers, Crossword Solver This crossword clue Mackerel was discovered last seen in the February 22 2020 at the Penny Dell Medium Crossword. The crossword clue possible answer is available in 4 letters. This answers first letter of which starts with C and can be found at the end of O. We think CERO is the possible answer on this clue. Crossword clues for Mackerel