TASK DEFINITION: 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.
PROBLEM: Category: "X" IN THE CITY 
Clue: Famous for temple ruins, this city on the site of Thebes has been called "The World's Greatest Open-Air Museum"

SOLUTION: luxor

PROBLEM: Category: POET-TREE 
Clue: "O my palm-tree…rustle thy boughs and set thy trunk all bare", she wrote in "Sonnets from the Portuguese"

SOLUTION: elizabeth barrett browning

PROBLEM: Category: BIG BOTTOM 
Clue: A lowlife opportunist, or a fish like the lake sturgeon, which takes sustenance from the bed of big lakes

SOLUTION:
a bottom-feeder