front for something
phrasal verb with front verb uk/frʌnt/ us/frʌnt/
替…打掩护;为…当幌子
If a person fronts for an illegal organization, they help that organization by using their good reputation to hide its secret activities.
The police suspect him of fronting for a crime syndicate. 警方怀疑他为一个犯罪财团打掩护。