Another version of the late ogre comes to grief (5,3)
I believe the answer is:
alter ego
'another version' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'of the late ogre comes to grief' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'comes to grief' is an anagram indicator.
'late' is an anagram of 'alte'.
'ogre' is an anagram of 'rego'.
'alte'+'rego'='ALTER EGO'
Can you help me to learn more?
(Other definitions for alter ego that I've seen before include "Go, relate to other self" , "Hidden or second self - in Latin" , "bosom buddy" , "Similar character" , "Is it Kent" .)