[n] someone who supports or champions something
[n] an advocate who presents a person (as for an award or a degree or an introduction etc.)
[v] do one's shopping at; do business with; be a customer or client of
[v] assume sponsorship of
[v] assume responsibility for or leadership of; "The senator announced that he would sponsor the health care plan"
buy at, frequent, patron, patronise, patronise, patronize, patronize, presenter, shop, shop at, supporter