The term 'Called On' can be broken down into three crossword solutions: VISITED (7 letters), Tapped (6 letters), and Asked (5 letters). VISITED is a verb that means to go to a place or person, usually for a specific purpose. Tapped is also a verb that means to lightly hit something with a finger or object. Finally, Asked is a verb that means to request information from someone. All three words are related to the term 'Called On' in that they all involve making contact with someone or something.