The crossword solution for the term 'TIE UP THE TELEPHONE' is 'YAK'. This is a slang term that means to talk on the phone for a long period of time. It is often used to describe someone who talks too much or too long on the phone. The phrase 'TIE UP THE TELEPHONE' is used to describe the act of talking on the phone for an extended period of time, thus preventing other people from using the phone.