The term 'AUTO DEVICE' can be broken down into two crossword solutions: 'AUTO' (4 letters) and 'DEVICE' (6 letters). The term 'AUTO' is a shortened form of the word 'AUTOMOBILE' which is a vehicle that is self-propelled and powered by an internal combustion engine. The term 'DEVICE' refers to any object or tool that is used to perform a specific task. In this case, the DEVICE is a 'HEATER' (6 letters), which is an appliance that is used to heat a room or other enclosed space.