Natural magic in a grotto, somewhat uplifting (7)
I believe the answer is:
organic
'natural' is the definition.
(similar in meaning)
'magic in a grotto somewhat uplifting' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'uplifting' says the letters should be written backwards.
'cinagro' is hidden within 'magic in a grotto'.
'cinagro' in reverse letter order is 'ORGANIC'.
(Other definitions for organic that I've seen before include "Biological" , "Free of pesticides" , "Made from living matter" , "Gin, Cora? (Anag)" , "without fertiliser" .)