The crossword solution for the term CLEAR A WINDSHIELD, PERHAPS is DEFOG. Defogging a windshield is a process of removing fog or condensation from the inside of a car's windshield. This is usually done by turning on the air conditioning and setting it to the highest temperature, which helps to evaporate the moisture. Additionally, some cars have a defogger button that can be used to quickly clear the windshield.