The term 'Walkie-Talkie' is a two-way radio device that allows for communication between two or more people. It is commonly used by police, military personnel, and other emergency services. The term is derived from the combination of the words 'WALK' and 'TALK', which refer to the ability of the device to be used while walking. The crossword solution for this term is 'TALKIE', which is a six letter word.