subindustry

noun

1. An industry that makes up part of a larger industry.

   “Another “Masterpiece” mini-series that season was “Elizabeth R,” starring a fierce and eventually half-bald Glenda Jackson, which could be said to have set into motion an entire Tudor subindustry: films and series about Boleyn’s daughter, among them the two Cate Blanchett “Elizabeth” movies and Helen Mirren ’s 2005 portrayal of the queen who was the namesake of the one she earned an Academy Award for playing a couple of years later, in “The Queen.””