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 consistency, answers should be in all lower cased letters.

[Q]: Category: PROVERBS BY INITIALS 
Clue: "A watched P.N.B."
[A]: pot never boils


[Q]: Category: THE DIRECTOR 
Clue: Born in this city in 1895, J. Edgar Hoover graduated from its National University law school in 1917
[A]: washington


[Q]: Category: 1990s BESTSELLERS 
Clue: In 1998 his novel "Rainbow Six" became another in his long line of military bestsellers
[A]:
tom clancy