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: INTERNATIONAL "C"UISINE 
Clue: French chefs turn this freshwater crustacean into mousse d'ecrevisse
crawfish

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

Category: DOMINOES 
Clue: A domino with both ends having the same value is called a double or this, which is 1 letter longer & also a garment

a doublet