Sentence:  In 1964, Dizzy Gillespie ran for the US presidency on an anti-racism, pro-bebop platform. Sholto Byrnes looks back on the very brief political career of one very <WSD>cool cat</WSD>. 
Meaning of the word marked with <WSD> tags:  A person who performs or appreciates jazz, especially one whose style of speech and movement is relaxed and rhythmic.