The phrase "clouding over" typically means a gradual increase in cloudiness or darkness, often indicating a potential for precipitation or an upcoming storm. Some antonyms for "clouding over" could include clear skies, sunny weather, brightening up, or any other phrase that suggests a clearing of cloudiness or an improvement in weather conditions. Other antonyms might focus on the emotional or mental state of an individual, such as clarity of mind, positive thinking, or a sense of inner peace. Ultimately, the antonyms of "clouding over" will depend on the context and intended meaning of the phrase.