Heavenly in Somerset — here also (8)
I believe the answer is:
ethereal
'heavenly' is the definition.
('ethereal' can be similar in meaning to 'heavenly')
'in somerset here also' is the wordplay.
'in' indicates a hidden word.
'ETHEREAL' is hidden in the letters of 'somerset here also'.
(Other definitions for ethereal that I've seen before include "'Delicate, heavenly (8)'" , "Airy, celestial" , "Very delicate - tale here (anag)" , "Insubstantial, other-worldly" , "Of the spirit" .)