"Clue" is a trademark for a boardgame, but you could legitimately buy and sell clue.com for uses other than for boardgames. If you tried to buy and sell ClueBoardgame.com or ParkerBrosClue.com, names which can only be used in an infringing way, then you would have very serious problems with federal law and UDRP actions. As well you should, because knowingly trying to profit off another's trademark is immoral and makes other name speculators look bad by association.
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definately makes sense.