Method of cooking the quince (9)
I believe the answer is:
technique
'method' is the definition.
(technique is a kind of method)
'cooking the quince' is the wordplay.
'cooking' indicates anagramming the letters (cook can mean to falsify or distort).
'the'+'quince'='thequince'
'thequince' with letters rearranged gives 'TECHNIQUE'.
'of' is the link.
(Other definitions for technique that I've seen before include "See 6" , "Method for performing skilfully" , "Method for doing something" , "Proficiency" , "Skilful method" .)