Unusual need for a garden (4)

I believe the answer is:

eden

'garden' is the definition.
(Garden of Eden in the Bible)

'unusual need' is the wordplay.
'unusual' is an anagram indicator.
'need' anagrammed gives 'EDEN'.

'for a' is the link.

(Other definitions for eden that I've seen before include "Unspoiled paradise" , "Cornish garden; paradise" , "happy state" , "Paradise - ex-PM" , "Biblical garden" .)

I've seen this clue in the Evening Standard.

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