Builder of a San Simeon castle (6)

I believe the answer is:

hearst

(Other definitions for hearst that I've seen before include "William Randolph - - (tycoon)" , "News chief" , "US newspaper magnate; haters (anag.)" , "Newspaper mogul" , "Former publisher" .)

I've seen this clue in The Wall Street Journal.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.