The term 'quaintly stylish' can be described by the crossword solution MOD, which is an abbreviation for modernism. Modernism is a style of art, literature, and music that emerged in the late 19th century and was popular throughout the 20th century. It is characterized by its rejection of traditional forms and its embrace of experimentation and innovation. Quaintly stylish is a term used to describe something that is both modern and traditional, combining elements of both styles.