The term SPINNING PART can be solved by the crossword solution ROTOR, which is a five-letter word. A ROTOR is a spinning part of a machine, such as an electric motor or a generator, that is used to convert energy into motion. It is typically made up of a cylindrical metal shaft with several vanes attached to it. The vanes are designed to catch and redirect the flow of air or liquid, creating a rotational force that can be used to power the machine.