EU backs protective measure, British pound for French food (6,4)
I believe the answer is:
cordon bleu
'french food' is the definition.
'eu backs protective measure british pound' is the wordplay.
'backs' is a charade indicator (letters next to each other).
'protective measure' becomes 'cordon'.
'british' becomes 'b' (abbreviation e.g. in 'BBC').
'pound' becomes 'L' (abbreviation e.g. Lsd - pounds, shillings, pence).
'cordon'+'b'+'l'='cordonbl'
'eu' after 'cordonbl' is 'CORDON BLEU'.
'for' is the link.
(Other definitions for cordon bleu that I've seen before include "(Of cookery) very high standard" , "Of a very high standard (food)" , "distinguished chef" , "High class chef" , "Of the highest culinary order" .)