The term 'Joyful Tune' can be broken down into two crossword solutions: 'LILT' and 'CAROL'. A 'LILT' is a light, cheerful tune or song, often with a skipping rhythm. It is usually sung in a high-pitched voice. A 'CAROL' is a traditional religious song or hymn, typically associated with Christmas. It is usually sung in a group and often includes a chorus. Both of these terms are used to describe a joyful tune.