Verve, swagger (7)
I believe the answer is:
panache
I believe this clue is a double definition.
'verve' is the first definition.
(I've seen this in another clue)
'swagger' is the second definition.
(I've seen this before)
(Other definitions for panache that I've seen before include "Flamboyant sense of style" , "Swagger; theatricality" , "stylish carriage" , "'Dash, flair (7)'" , "flourish" .)