The Federal Communications Commission cleared the way for General Electric Co., which owns NBC, to buy Miami television station WTVJ even though the city already has an NBC affiliate . . . Los Angeles-based National Medical Enterprises announced plans to construct six facilities--two psychiatric hospitals, two replacement hospitals and two residential treatment centers--at a cost of $36.3 million and will also expand seven psychiatric hospitals at a cost of $26.4 million . . . Assets of 396 money-market funds tracked by the Investment Company Institute rose $466.2 million to $245.57 billion in the week ended Wednesday, the institute reported . . . Marshall Field's 135-year-old flagship store in downtown Chicago will receive a $110-million face lift in a five-year project scheduled to begin in January . . . Limited Inc. said it expects to post second-half income between 25% and 30% higher than in the year-ago period . . . Sara Lee Corp. is negotiating to buy the food and consumer products business of the Dutch firm Akzo NV for $600 million and is also selling its Electrolux division to an investor group led by Electrolux management. Terms were not disclosed.