The term 'Sleep Inducer of Song' can be solved by the crossword solution 'Sandman' (7 letters). The Sandman is a mythical figure in European folklore who brings good dreams to children by sprinkling magical sand onto their eyes. He is often depicted as a man wearing a black suit and hat, carrying a bag of sand. In popular culture, the Sandman has been featured in books, films, television shows, and songs, often as a metaphor for sleep or dreams.