Cheese list, not changed (7)
I believe the answer is:
stilton
'cheese' is the definition.
(Stilton is an example)
'list not changed' is the wordplay.
'changed' is an anagram indicator.
'list'+'not'='listnot'
'listnot' with letters rearranged gives 'STILTON'.
(Other definitions for stilton that I've seen before include "Rich, blue-veined cheese" , "English blue-veined cheese" , "English blue cheese" , "Strong blue cheese" , "19 cheese" .)