Cheese possibly not on the revised list (7)
I believe the answer is:
stilton
'cheese' is the definition.
(stilton is a cheese)
'possibly not on the revised list' is the wordplay.
'possibly' indicates anagramming the letters.
'on' is a charade indicator (letters next to each other).
'the revised' indicates anagramming the letters.
'not' is an anagram of 'ton'.
'list' anagrammed gives 'stil'.
'ton' put after 'stil' is 'STILTON'.
(Other definitions for stilton that I've seen before include "Strong English cheese, originally from Leicestershire" , "Blue 8 across" , "19 cheese" , "English blue-veined cheese" , "Strong Eng. cheese" .)