What 1988 movie was George Clooney's first "starring" role on the big screen?

Return of the Killer Tomatoes! is a 1988 American comedy horror film directed by John De Bello. The first sequel to the 1978 film Attack of the Killer Tomatoes, the film stars Anthony Starke, Karen Mistal, and John Astin, as well as George Clooney in an early role. The film has developed a cult following.

Set 10 years after the events of Attack of the Killer Tomatoes (referred to as the Great Tomato War), the United States is once again safe, and tomatoes have been outlawed (although authorities still deal with "tomato smugglers" who sell to people who cannot live without ordinary tomatoes). Wilbur Finletter (Steve Peace) has been praised as a hero of the Great Tomato War and parlayed his fame into opening Finletter's Pizzeria, which serves tomato-less pizzas. Working for Wilbur is his nephew Chad Finletter (Anthony Starke) who is a delivery boy. Also with Chad is his roommate Matt Stevens (George Clooney), a suave ladies' man.