Heavenly ale -- three drunk (8)
I believe the answer is:
ethereal
'heavenly' is the definition.
('ethereal' can be similar in meaning to 'heavenly')
'ale three drunk' is the wordplay.
'drunk' indicates an anagram.
'ale'+'three'='alethree'
'alethree' with letters rearranged gives 'ETHEREAL'.
(Other definitions for ethereal that I've seen before include "Like fairies" , "'Delicate, heavenly (8)'" , "'Fairy-like, delicate (8)'" , "Light, delicate, insubstantial" , "Spiritual" .)