Joyfulness (7)
I believe the answer is:
elation
'joyfulness' is the definition.
(elation is a kind of joyfulness)
This is the entire clue.
(Other definitions for elation that I've seen before include "Feeling of delight or pride" , "High feeling?" , "Euphoria of toenail" , "Great happiness and exhilaration" , "Feeling of intense delight" .)