Princess is back in the garden; nature-lover (4)
I believe the answer is:
anne
'princess' is the definition.
(I've seen this before)
'back in the garden nature-lover' is the wordplay.
'back' says the letters should be written in reverse.
'in' indicates the answer is hidden within the clue.
'enna' is hidden in the letters of 'garden nature lover'.
'enna' reversed gives 'ANNE'.
'is' acts as a link.
(Other definitions for anne that I've seen before include "--- Elliot, later Wentworth (J. Austen)" , "One of Henry VIII's wives" , "Shakespeare's wife's name" , "The Princess Royal" , "Queen 1702-1714" .)