Create an impression in France and Switzerland (4)
I believe the answer is:
etch
'create an impression' is the definition.
(to etch is to make an impression in something)
'in france and switzerland' is the wordplay.
'in france and' becomes 'et' ('and' in French).
'switzerland' becomes 'ch' (short for Confoederatio Helvetica, its Latin name).
'et'+'ch'='ETCH'
(Other definitions for etch that I've seen before include "What most engravers presumably find easy to do" , "Engrave deeply" , "Carve into surface, impress deeply" , "Engrave; fix firmly" , "Draw on metal with acid" .)