Air and oil variety blended for food (7)
I believe the answer is:
ravioli
'blended for food' is the definition.
'ravioli' can be an answer for 'food' (ravioli is a kind of food). I'm not sure about the 'blended for' bit.
'air and oil variety' is the wordplay.
'air' becomes 'ravi' (I can't justify this - if you can you should give a lot more credence to this answer).
'and' means one lot of letters go next to another.
'variety' is an anagram indicator.
'oil' anagrammed gives 'oli'.
'ravi'+'oli'='RAVIOLI'
Can you help me to learn more?
(Other definitions for ravioli that I've seen before include "Small stuffed pasta" , "Filled form of pasta" , "food parcels" , "Filled type of pasta" , "Small, filled cases of dough" .)