Flair shown in choice language (4)
I believe the answer is:
elan
'flair' is the definition.
(I know that flair can be written as elan)
'in choice language' is the wordplay.
'in' says the answer is hidden in the clue.
'ELAN' can be found hidden inside 'choice language'.
'shown' acts as a link.
(Other definitions for elan that I've seen before include "Style and liveliness" , "Style and verve" , "Impetuosity - style" , "French vivacity" , "Dash, style" .)