Ever so happy (5)
I believe the answer is:
jolly
This might be a double definition.
'ever' is the first definition.
Both the answer and definition are adverbs. Perhaps they are linked in a way I don't understand?
'happy' is the second definition.
(I know that happy can be written as jolly)
'so' acts as a link.
Can you help me to learn more?
(Other definitions for jolly that I've seen before include "Happy, cheerful" , "all-expenses-paid trip" , "Very pleasurable" , "' - - boating weather' (song)" , "Mirthful" .)