European fillings contain corn meal (7)
I believe the answer is:
polenta
'meal' is the definition.
(I've seen this before)
'european fillings contain corn' is the wordplay.
I cannot quite understand how this works, but
'european' could be 'pole' (someone from Poland) and 'pole' is located in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for polenta that I've seen before include "Italian porridge usually of maize" , "Italian maize dough" , "Fine yellow cornmeal" , "Cornmeal -- on plate (anag)" , "Italian maize paste" .)