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: WITH LOVE 
Clue: My darling, only the best of this potent potable for you, like a fine extra brut Bollinger

SOLUTION: champagne

PROBLEM: Category: SAME FIRST & LAST LETTER 
Clue: An invisible emanation, or an intangible quality

SOLUTION: aura

PROBLEM: Category: LET'S HAVE A BALL 
Clue: It's a naphthalene sphere to repel a lepidopteran

SOLUTION:
a moth ball