Feeling of great elation (8)
I believe the answer is:
euphoria
'feeling of great elation' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for euphoria that I've seen before include "Sense of wellbeing" , "Irrational high" , "Blissful state" , "Feeling of great elation and joy" , "Intense feeling of well-being and elation." .)