Example of accepted position (8)
I believe the answer is:
instance
'example' is the definition.
(synonyms)
'accepted position' is the wordplay.
'accepted' becomes 'in' (I've seen this in other clues).
'position' becomes 'stance' (stance is a kind of position).
'in'+'stance'='INSTANCE'
'of' acts as a link.
(Other definitions for instance that I've seen before include "Case in point" , "Exemplify" , "Case or example from ancients" , "Canniest (anag) - occurrence" , "A case or example of something" .)