a person who represents an organization and tries to make its activities seem acceptable to the public, although in fact they may be illegal or dishonest (某组织的)代表,头面人物;(非法活动的)掩护者 a man who is the main singer in a pop or rock band 乐队领衔者 - (British English)
a person who presents a television programme Topics TV, radio and newsc2电视节目主持人