You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: 20th CENTURY AUTHORS
Clue: Ayn Rand once cited this late Mike Hammer author as her favorite popular writer
mickey spillane

Category: ROYAL WOMEN
Clue: Nori, his daughter, only fit the category until Nov. 15, 2005, when she married a commoner
akihito

Category: TV & MOVIE ACTORS
Clue: John Mahoney of "Frasier" played one of the guys who sold aluminum siding in this Barry Levinson film
tin men