Move there - all's somewhat heavenly! (8)
I believe the answer is:
'heavenly' is the definition.
('ethereal' can be similar in meaning to 'heavenly')
'move there all's somewhat' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'ETHEREAL' can be found hidden inside 'move there alls'.
(Other definitions for ethereal that I've seen before include "Insubstantial, other-worldly" , "'Delicate, heavenly (8)'" , "Airy or supernatural" , "Refined, airy" , "Extremely delicate and light; otherworldly" .)