Exhilarating (5)
'exhilarating' is the definition.
('thrill' can be a synonym of 'exhilarate')
This is all the clue.
(Other definitions for thrilling that I've seen before include "Causing pleasurable excitement" , "Sensational" , "Engrossing" , "Gripping" , "Hair-raising" .)
'exhilarating' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for heady that I've seen before include "Inebriating" , "Impetuous" , "Extremely exciting" , "Potent, intoxicating" .)