Brio, élan (5)
I believe the answer is:
verve
I believe this is a double definition.
'brio' is the first definition.
(I know that verve is a type of energy)
'elan' is the second definition.
(I've seen this in another clue)
(Other definitions for verve that I've seen before include "Dashing enthusiasm" , "Sparkling enthusiasm" , "Animation" , "Great liveliness or enthusiasm" , "Root tasting of oysters" .)