Race shows flamboyance (4)
I believe the answer is:
dash
I believe this clue is a double definition.
'race' is the first definition.
(dash is a kind of race)
'flamboyance' is the second definition.
(thesaurus)
'shows' acts as a link.
(Other definitions for dash that I've seen before include "Confound - verve" , "- - ; panache" , "Hyphen; race" , "If you're smart, you'll cut one" , "Drop" .)