The crossword solutions for the term 'LIKE THE WHO IN THEIR PRIME' are MOD, which stands for Modernism. Modernism was a cultural movement that began in the late 19th century and lasted until the mid-20th century. It was characterized by a rejection of traditional values and a focus on experimentation and innovation. The Who were a British rock band that rose to fame during the 1960s and 1970s, and were considered to be one of the most influential bands of their time. Therefore, the phrase 'LIKE THE WHO IN THEIR PRIME' can be interpreted as being similar to the modernist movement in terms of its innovative and experimental nature.