The crossword solution for the term DOUR ONE is CRAB. A CRAB is a type of crustacean that lives in the ocean and has a hard outer shell. It is known for its sideways walking motion and its ability to pinch with its claws. The term dour one can be used to describe someone who is gloomy, sullen, or stern. Therefore, the crossword solution of CRAB for the term DOUR ONE implies that the person is like a CRAB in their attitude.