When someone is "without a clue," it means that they are completely clueless or uninformed about a situation or task. There are several synonyms for this phrase, including "in the dark," "at a loss," "clueless," "ignorant," "unaware," and "unsure." These words are often used to express the idea of not knowing something or being uncertain about a particular course of action. In some cases, people might feel embarrassed about their lack of knowledge or understanding, so it's important to be sensitive and kind when interacting with someone who is "without a clue." By offering support and guidance, you can help them gain the knowledge and confidence they need to succeed.