Product that Wrigley manufactured before entering the chewing gum industry

SOAP

This everyday cleaning item was Wrigley's first business venture in 1891, sold door-to-door before his famous gum took off. Think lather, not flavor.

This clue refers to the early business of William Wrigley Jr., who originally sold baking powder before shifting to chewing gum. Before that, his first product was actually soap, which he manufactured and sold door-to-door in the 1890s. The answer plays on historical trivia about the company’s origins, making "SOAP" the straightforward but lesser-known fact behind the clue.