Nature deity (5)
I believe the answer is:
nymph
'nature deity' is the definition.
(I know that nymph is a type of nature deity)
This is all the clue.
(Other definitions for nymph that I've seen before include "Mythological spirit - larva" , "beautiful girl" , "Sprite" , "Semi-divine maiden associated with sea or wood" , "Immature insect; spirit" .)