What is one who delivers the opinion of others or of another; a spokesman; as, the mouthpiece of his party. Egmont was imprudent enough to make himself the mouthpiece of their remonstrance. Motley called?

mouthpiece — One who delivers the opinion of others or of another; a spokesman; as, the mouthpiece of his party. Egmont was imprudent enough to make himself the mouthpiece of their remonstrance. Motley. (Webster's 1913.)

Sources