The term 'BEATNIK's Drum' can be solved by the five-letter word 'BONGO'. A BONGO is a type of drum that is often associated with Latin American music, and it has become popular in jazz and other genres. It is also associated with the BEATNIK culture of the 1950s and 1960s, which was a movement of young people who rejected mainstream culture and embraced a more creative lifestyle. The BONGO is a key instrument in this culture, and it is often used to create a unique sound.