Most of earth consuming Italian food (7)
I believe the answer is:
burrito
'food' is the definition.
(I know that burrito is a type of dish)
'most of earth consuming italian' is the wordplay.
'most of earth' becomes 'burro' (I can't explain this - if you can you should give a lot more credence to this answer).
'consuming' means one lot of letters goes inside another.
'italian' becomes 'it' (abbreviation for Italian).
'burro' enclosing 'it' is 'BURRITO'.
Can you help me to learn more?
(Other definitions for burrito that I've seen before include "Mexican tortilla rolled round a savoury filling" , "Mexican dish - rub trio (anag)" , "Tortilla folded around a savoury filling" , "Tortilla folded round a filling" , "Mexican food" .)