Final equally balanced? Most of story is about United (8)
I believe the answer is:
eventual
'final' is the definition.
(thesaurus)
'equally balanced? most of story is about united' is the wordplay.
'equally balanced?' becomes 'even' (I've seen this before).
'most of' means to remove the last letter.
'story' becomes 'tale' ('tale' can be a synonym of 'story').
'is about' means one lot of letters goes inside another.
'united' becomes 'u'.
'tale' with its final letter taken away is 'tal'.
'tal' placed around 'u' is 'tual'.
'even'+'tual'='EVENTUAL'
(Other definitions for eventual that I've seen before include "Final, after a time" , "Ultimately resulting" , "Occurring at the end, ultimate" , "Coming at last, ultimate" , "Happening at the end of a period of time" .)