The crossword solution for the term 'Banjo Kin' is 'uke, ' which is a three-letter word. Uke is short for ukulele, a small four-stringed instrument that originated in Hawaii in the 19th century. It is similar to a banjo in that it has a round body and strings that are plucked or strummed. The ukulele is often associated with Hawaiian music, but it is also popular in other genres such as jazz, folk, and pop.