Standard, as men cooked cheese (8)
I believe the answer is:
parmesan
'cheese' is the definition.
(Parmesan is an example)
'standard as men cooked' is the wordplay.
'standard' becomes 'par' (I've seen this before).
'cooked' is an anagram indicator.
'as'+'men'='asmen'
'asmen' anagrammed gives 'mesan'.
'par'+'mesan'='PARMESAN'
(Other definitions for parmesan that I've seen before include "Italian cheese for spearman" , "Dry sharp-flavoured Italian cheese" , "Italian cheese, often grated" , "Hard dry Italian cheese" , "Cheese for grating" .)