Possible Clues:

• Tarzan creator's first name
• With 13-Across, 'The Rehearsal' painter
• King housed in walled garden
• Poor Tom makes grade
• Degas or Bergen
• . . . . . Allan Poe, master of the macabre
• Hoover's predecessor?
• - Rice Burroughs, US novelist
• Fellow's reviewed grade
• Award for P.D. James