Inuit sauce he mixed, producing top-quality cooking (5,7)
I believe the answer is:
haute cuisine
'top-quality cooking' is the definition.
(French term for high-quality cooking)
'inuit sauce he mixed' is the wordplay.
'mixed' indicates anagramming the letters.
'inuit'+'sauce'+'he'='inuitsaucehe'
'inuitsaucehe' anagrammed gives 'HAUTE CUISINE'.
'producing' is the link.
(Other definitions for haute cuisine that I've seen before include "Fine cooking" , "Cookery of a very high standard" , "Menu" , "high table at the Sorbonne?" .)