Clued one in is an informal phrase that means to inform or provide information to someone. Antonyms of "clued one in" include keeping someone in the dark, keeping someone ignorant, keeping someone oblivious, not telling someone, and withholding information from someone. These antonyms indicate the opposite action of providing information or knowledge to someone. Communicating with others is an essential aspect of human interaction, and it is vital to be mindful of how we convey information to others. While it is important to share information, it is equally important to be respectful and considerate of others' feelings and perspectives.