PRESIDENT OFFERS $18 BILLION MORE IN MEDICARE CUTS
Clinton Administration offers to make additional cuts of $18 billion in projected Medicare spending over next five years to help reach agreement on eliminating Federal deficit; Administration, in saying that it is willing to compromise further on Medicare, is seeking to appear flexible as two sides begin their first serious negotiations since their impasse in late 1995 led to Government shutdown; Administration had previously proposed plan that it said would cut growth of Government health care spending for elderly by $100 billion over five years, while most recent Republican offer was $158 billion over six years; Republicans say they welcome Administration's proposal but want to study it further (M)

