The crossword solution for the term COME IN AND --- SITA is a four-letter word. The answer is 'SPELL'. This phrase is often used IN educational settings, such as classrooms, to encourage students to participate IN spelling activities. It is also used IN other contexts, such as when someone is trying to learn a new language or when someone is trying to remember a difficult word. By saying 'COME IN AND SPELL, ' the speaker is inviting the listener to join IN AND help them with their task.