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.
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Question: Category: JOE THE PLUMBER 
Clue: Joe knows how to "assemble" 2 words into this 1-word toilet part by combining comedienne Lucille & a male chicken

Answer: a ballcock


Question: Category: ROMANCE NOVELIST HISTORY BOOK 
Clue: It was WWI. Her new name meant "eye of the dawn" & she felt reborn.  Oh, how she loved German military men!

Answer: mata hari


Question: Category: THE NATIONAL TOY HALL OF FAME 
Clue: Joshua Cowen gave his middle name to this brand of model trains

Answer:
lionel