Look for 'ROAD' in French (4)
I believe the answer is:
mien
'look' is the definition.
(thesaurus)
'road in french' is the wordplay.
'road' becomes 'mi' (**).
'in french' becomes 'en' ('en' can be French for 'in' e.g. en France).
'mi'+'en'='MIEN'
'for' acts as a link.
(Other definitions for mien that I've seen before include "attitude" , "A person's demeanour" , "A face like mine" , "Comportment" , "The carriage" .)