Garden; paradise (4)
I believe the answer is:
eden
This clue is a double definition.
'garden' is the first definition.
(Garden of Eden in the Bible)
'paradise' is the second definition.
(Garden of Eden)
(Other definitions for eden that I've seen before include "Former prime minister" , "Paradise - ex-prime minister" , "Adam and Eve's garden" , "Tory Prime Minister, 1955-57" , "The near-perfect garden" .)