Ale-tipsy, coming in nags about the food (7)
I believe the answer is:
lasagne
'the food' is the definition.
(lasagne is a kind of food)
'ale-tipsy coming in nags about' is the wordplay.
'tipsy' indicates anagramming the letters.
'coming in' means one lot of letters goes inside another.
'about' indicates an anagram.
'ale' anagrammed gives 'lae'.
'nags' is an anagram of 'sagn'.
'lae' going around 'sagn' is 'LASAGNE'.
(Other definitions for lasagne that I've seen before include "continental dish" , "Italian dish with layers of pasts and mince between" , "Italian cooking" , "The Italian dish is a gas, Len" , "Baked pasta dish" .)