French cheese that is behind British (4)
I believe the answer is:
brie
'french cheese' is the definition.
(I know that Brie is a cheese)
'that is behind british' is the wordplay.
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'behind' says to put letters next to each other.
'british' becomes 'br' (abbreviation for British).
'ie' put after 'br' is 'BRIE'.
(Other definitions for brie that I've seen before include "Prov. squalid place" , "Soft and creamy mild white cheese" , "French cream cheese" , "Kind of soft cheese" , "French produce" .)