The crossword solution for the term 'Country Music Staple' is 'Banjo'. The banjo is a stringed instrument that has been used in country music since the 19th century. It is typically played with a pick and has a distinctive twangy sound. The banjo is often associated with bluegrass, folk, and old-time music. It is also a popular instrument in many other genres of music, including rock, jazz, and pop.