The crossword solution for the term 'BLUES' is 'YER, ' which is a three-letter track from The Beatles' 1968 album, commonly known as the 'White Album.' The track is titled 'Yer BLUES, ' and it is a BLUES-rock song written by John Lennon. It is one of the few songs on the album to feature all four Beatles playing together. The song is noted for its heavy electric guitar sound and its lyrics about depression and loneliness.