Song of joy (5)
I believe the answer is:
carol
'song of joy' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for carol that I've seen before include "See 1" , "Joyful hymn" , "Girl's name; sing" , "Joyful religious song" , "Joyful song - girl's name" .)