The term CLEAN A DISKETTE is a job description that involves erasing, erasing, and scouring a diskette. Erasing a diskette means to remove all the data stored on it, while erasing it means to overwrite the existing data with new data. Scouring a diskette means to use a special program to clean the diskette of any errors or viruses. This process ensures that the diskette is free of any unwanted data and is ready for use.