frontman
/ˈfrʌntmæn/noun
(pl. -men /-men/ )
1- a person who leads or represents a group or organization, in particular团体（或组织）的负责人, 尤指：
1.1
- the leader of a group of musicians, especially the lead singer of a pop group领奏; （尤指流行乐队的）主唱。
1.2
- a presenter of a television programme电视节目主持人。
1.3
- a person who represents an illegal or disreputable organization to give it an air of legitimacy非法（或声名狼藉）组织的庇护人。