The term 'Expositor' is a nine-letter crossword solution for the term 'A Person Who Explains'. An Expositor is someone who explains or interprets something, often in a formal or authoritative manner. They are typically knowledgeable in the subject matter and can provide detailed explanations and interpretations. Expositors are often used in educational settings to explain complex topics to students. They may also be used in legal settings to explain laws and regulations.