The French decline ends of nouvelle dish (7)
I believe the answer is:
lasagne
'dish' is the definition.
(lasagne is a kind of dish)
'the french decline ends of nouvelle' is the wordplay.
'the french' becomes 'la'.
'decline' becomes 'sag' (I've seen this before).
'ends of' says to hollow out the word (remove centre letters).
'nouvelle' with its middle taken out is 'ne'.
'la'+'sag'+'ne'='LASAGNE'
(Other definitions for lasagne that I've seen before include "Layered pasta dish" , "Italian dish with layers of pasts and mince between" , "Flat sheets of pasta" , "Wide flat strips of pasta" , "Course" .)