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: HOW DO THEY WORK? 
Clue: Many car salesman work on "straight" this, though you're better off buying from one who's on salary

Answer: commission


Question: Category: 10-LETTER WORDS 
Clue: (Jimmy of the Clue Crew in Seattle)  Used in "Hamlet", it's the common British term for the vendor I'm buying from

Answer: fishmonger


Question: Category: COLONIAL AMERICA 
Clue: In 1754, the French built Fort Duquesne on the present-day site of this city

Answer:
pittsburgh