French language for British school (6)
I believe the answer is:
breton
'french language' is the definition.
(I've seen this before)
'british school' is the wordplay.
'british' becomes 'br'.
'school' becomes 'eton' (famous UK public school).
'br'+'eton'='BRETON'
'for' is the link.
(Other definitions for breton that I've seen before include "A native of Brittany, France" , "One from Brest" , "Surrealist" , "Person from Brittany" , "from Northern France" .)