The term CORDIAL GLASS FEATURE is a crossword solution that consists of four letters: STEM. A STEM is an integral part of a cordial glass, which is a type of small glass used for serving liqueurs and other alcoholic beverages. The STEM of the glass is the thin, cylindrical part that connects the bowl of the glass to its base. It is designed to provide stability and balance to the glass, allowing it to be held without spilling its contents.