Need to reorder garden (4)
I believe the answer is:
eden
'garden' is the definition.
(I know that Eden is a garden)
'need to reorder' is the wordplay.
'to reorder' is an anagram indicator (I've seen this in other clues).
'need' with letters rearranged gives 'EDEN'.
(Other definitions for eden that I've seen before include "The first habitat" , "Old Testament garden" , "prime minister in the past" , "Adam and Eve's 19" , "Perfect place" .)