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.
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Question: Category: IT'S A DOG'S LIFE 
Clue: Familiar to fans as "Marmaduke", this lovable breed was a favorite of Elvis, who had 2 at Graceland

Answer: a great dane


Question: Category: CLOSE BUT NO SITAR 
Clue: "Tailgate" was once a popular style of New Orleans jazz featuring this slide instrument

Answer: trombone


Question: Category: LIGHTEN UP! 
Clue: On August 9, 1988 the Cubs' first game under this stadium's new lights was postponed due to rain

Answer:
wrigley field