Exuberantly joyful (7)
I believe the answer is:
gleeful
'exuberantly joyful' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for gleeful that I've seen before include "Exuberantly joyful" , "Happy" , "Cheerful" , "Exuberantly joyous" , "Jubilant" .)