Wiktionary
win back
vb. 1 (context transitive idiomatic English) to win money that has been lost. 2 (context transitive idiomatic English) To regain favour (with)
WordNet
win back
v. recover something or somebody that appeared to be lost; "We got back the money after we threatened to sue the company"; "He got back his son from the kidnappers" [syn: get back]