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.

[Q]: Category: STARTS & ENDS WITH "H" 
Clue: To secretly devise something, like a plan for a really good door on my boat
[A]: hatch


[Q]: Category: PEOPLE 
Clue: The first name of this "Ally McBeal" star means "most beautiful" in Greek
[A]: calista


[Q]: Category: BRITISH ROYAL RESIDENCES 
Clue: This fortress was built by William the Conqueror; Henry VIII was the last king to use it as a chief residence
[A]:
tower of london