The term 'SERVES SUPERBLY' can be broken down into two crossword solutions: ACES (4 letters). The term 'ACES' is a slang term used to describe someone who is exceptionally skilled at something. It is often used to describe someone who is an expert in their field, or someone who performs a task with great skill and precision. In this context, it could be used to describe someone who serves superbly, meaning they provide excellent service.