High-spirited (9)
I believe the answer is:
exuberant
This clue is a double definition.
'high' is the first definition.
(thesaurus)
'spirited' is the second definition.
(similar in meaning)
(Other definitions for exuberant that I've seen before include "Lively, cheerful" , "Vivacious; effusive" , "Full of high spirits, very lively" , "Joyous" , "Full of energy, high spirits" .)