The crossword solution for the term 'WHAT SLIPPERS GENERALLY LACK' is 'LACES'. Slippers are a type of footwear that are designed to be worn indoors and are usually made of soft materials such as cloth, fur, or foam. They are typically slip-on shoes, meaning they do not have any LACES or straps to secure them to the foot. This makes them easy to put on and take off, but also means that they generally lack LACES.