Bewitching (8)
'bewitching' is the definition.
('charm' can be a synonym of 'bewitch')
This is the entire clue.
(Other definitions for charming that I've seen before include "Beguiling, enchanting" , "Delightful, attractive" , "Lovely! - with 15a" .)
(Other definitions for stunning that I've seen before include "Extremely impressive or attractive" , "amazing" , "Extremely attractive - knocks you out" , "Very attractive (informal)" , "Beautiful - causing insensibility" .)
'bewitching' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for magical that I've seen before include "Occult, supernatural" , "miraculous!" , "Charming" , "Enchanted" , "charmed" .)