Need to change the garden (4)
I believe the answer is:
eden
'garden' is the definition.
(Garden of Eden in the Bible)
'need to change' is the wordplay.
'to change' indicates anagramming the letters.
'need' anagrammed gives 'EDEN'.
'the' is the link.
(Other definitions for eden that I've seen before include "Adam and Eve's garden" , "Paradise - ex-prime minister" , "Genesis garden" , "Delightful place" , "The first garden" .)