Second winner (8)
I believe the answer is:
champion
I believe this clue is a double definition.
'second' is the first definition.
(thesaurus)
'winner' is the second definition.
(thesaurus)
(Other definitions for champion that I've seen before include "Stick up for" , "'Winner, title-holder (8)'" , "Excellent" , "Guard" , "Champ" .)