A master class is a type of educational seminar or workshop led by an expert in a particular field. The term 'master class' is derived from the traditional apprenticeship system, where a master craftsman would teach their craft to an apprentice. In modern times, a master class is typically a one-time event, often held at a university or other educational institution, where a renowned expert in a particular field will give a lecture and provide instruction to a group of students. The crossword solution for MASTER CLASS is CLINIC, which refers to the type of educational setting in which a master class is usually held.