A couple of salad and herb wraps not prime food (7)
I believe the answer is:
lasagne
'not prime food' is the definition.
'lasagne' can be an answer for 'food' (lasagne is a kind of food). I am unsure of the 'not prime' bit.
'a couple of salad and herb wraps' is the wordplay.
'a couple of salad' becomes 'la' (I can't justify this - if you can you should give a lot more credence to this answer).
'and' becomes 'n' (common abbreviation for 'and').
'herb' becomes 'sage' (sage is a kind of herb).
'wraps' indicates putting letters inside (inserted letters get wrapped up).
'n' put inside 'sage' is 'sagne'.
'la'+'sagne'='LASAGNE'
Can you help me to learn more?
(Other definitions for lasagne that I've seen before include "Sheet pasta" , "continental dish" , "Eat this as angel" , "Flat sheets of pasta" , "Baked pasta dish" .)