Wiktionary
hang out to dry
vb. 1 (&lit hang out dry English) 2 (context transitive idiomatic English) To abandon someone who is in need or in danger, especially a colleague or one dependent.
Usage examples of "hang out to dry".
In my humble and insignificant opinion, any person who lets her people, even guys like Hardcastle, hang out to dry like you did and ignores all the danger signs around her is an asshole--ma'am.
Her reservation about him was that several times in these ten years he had let an assistant who had made an honest mistake hang out to dry.
Give a nineteenth-century sorcerer two zombie servants, one a male criminal, one a female whore, and which will he let hang out to dry?
Another cloth to dirty, to wash, to hang out to dry, and then to put in that great pile awaiting the flatiron.