The term 'CALLS UP' can be broken down into four crossword solutions: REMEMBERS (9 letters), EVOKES (6 letters), PHONES (6 letters), and RINGS (5 letters). To remember something is to recall it from memory, while to evoke something is to bring it to mind. To phone someone is to call them on the telephone, while to ring someone is to call them by ringing a bell or other device. All of these terms refer to the act of calling someone up, either in person or over the phone.