The crossword solution for the term 'LESSER-KNOWN SONG' is 'DEEPCUT', a seven letter word. Deepcut is a lesser-known song by the British rock band, Coldplay. It was released as part of their third studio album, X&Y, in 2005. The song is an upbeat, alternative rock track with a catchy chorus and memorable guitar riffs. Deepcut has become a fan favorite among Coldplay fans, despite its relative obscurity.