Victory before alternative follower (9)
I believe the answer is:
successor
'follower' is the definition.
(thesaurus)
'victory before alternative' is the wordplay.
'victory' becomes 'success' (I've seen this in another clue).
'before' says to put letters next to each other.
'alternative' becomes 'or'.
'success'+'or'='SUCCESSOR'
(Other definitions for successor that I've seen before include "One follows next in order" , "I follow" , "one coming after you" , "One who follows another" , "Person who follows next in order" .)