The term 'signature songs' refers to a song that is closely associated with a particular artist or group. These songs are often the most popular and recognizable of an artist's work, and can become anthems for their fans. Examples of signature songs include 'Bohemian Rhapsody' by Queen, 'Sweet Child O' Mine' by Guns N' Roses, and 'Smells Like Teen Spirit' by Nirvana. The crossword solutions for the term 'signature songs' could include words such as 'themes, ' which could refer to the lyrical content of the song, or the overall message it conveys.