The crossword solution for the term 'Good Serve' is ACE, which stands for 'Athletic Club Expert'. This is a job title that is typically given to someone who works in a gym or fitness center and is responsible for providing excellent customer service. They are expected to be knowledgeable about the facility's services and products, as well as be able to answer any questions customers may have. Additionally, they must be able to provide advice and guidance on how to use the equipment and facilities safely and effectively.