Crisp filling German food (7)
I believe the answer is:
risotto
'food' is the definition.
(risotto is a kind of food)
'crisp filling german' is the wordplay.
'filling' says to take the centre (the letters which fill the word).
'german' becomes 'otto' (common German name).
The central letters of 'crisp' are 'ris'.
'ris'+'otto'='RISOTTO'
(Other definitions for risotto that I've seen before include "dishy thing!" , "Italian dish cooked with broth" , "Rice/stock dish" , "Main course" , "Italian dish of rice, meat and vegetables" .)