Find again left-winger ones to embrace (10)
I believe the answer is:
rediscover
'find again' is the definition.
('discover' is an answer for 'find' so perhaps 'rediscover' is OK for 'find again')
'left-winger ones to embrace' is the wordplay.
'left-winger' becomes 'red' (red is a kind of left-winger).
'ones' becomes 'is' ('I' can be a synonym of 'one').
'to embrace' becomes 'cover' ('cover' can be a synonym of 'embrace').
'red'+'is'+'cover'='REDISCOVER'
(Other definitions for rediscover that I've seen before include "Not for the first time, find" , "Find encore" , "Spy out again" .)