Crossword clues for the word: CALTROP The word CALTROP has appeared as an answer to at least 3 crossword clues on different crossword puzzles. Crossword clues for CALTROP Showing 1 to 3 of 3 results Clue(s) Spiky device thrown in the road to puncture a speeding suspect's tires Spiky device thrown in the road to puncture tires Tire-puncturing strip