Paradise Regained (everyone's content after reverse) (4)
I believe the answer is:
eden
'paradise' is the definition.
('eden' can be a synonym of 'paradise')
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for eden that I've seen before include "(Biblical) paradise" , "Need an odd garden?" , "The most enchanting garden of all" , "Adam and Eve's first home" , "Anthony ---, PM 1955" .)