The Spanish have a way to show style and vigour (4)
I believe the answer is:
elan
'style and vigour' is the definition.
(I've seen this before)
'the spanish have a way' is the wordplay.
'the spanish' becomes 'el' ('the' in Spanish).
'have' is a charade indicator (letters next to each other).
'way' becomes 'n' (Compass direction - North).
'el'+'a'+'n'='ELAN'
'to show' is the link.
(Other definitions for elan that I've seen before include "Stylish elegance" , "Dash in French lane" , "Impetuosity - style" , "Panache - ardour" , "Stylishness" .)