Wild wise man takes a victory (6)
I believe the answer is:
savage
'wild' is the definition.
('savage' can be a synonym of 'wild')
'wise man takes a victory' is the wordplay.
'wise man' becomes 'sage' (sage is a kind of wise man).
'takes' indicates putting letters inside.
'victory' becomes 'v'.
'a'+'v'='av'
'sage' enclosing 'av' is 'SAVAGE'.
(Other definitions for savage that I've seen before include "Barbaric, uncivilised" , "Wild, untamed" , "Fierce, violent" , "Brutally criticise" , "Fierce, uncontrolled" .)