Feeling great rapture or delight (8)
I believe the answer is:
ecstatic
'feeling great rapture or delight' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for ecstatic that I've seen before include "elated" , "Showing great delight" , "Rapturous" , "Feeling immense joy" , "in a trance" .)