The Clinton Administration today proposed establishing a free trade zone to eliminate duties on commerce between the U.S. and Western European nations. Assistant Secretary of State Richard Holbrooke stressed that the concept has not gone beyond the proposal stage since it was first talked about in the White House six months ago. "It is a good idea whose time hasn't come yet," Holbrooke said. The idea originated from AFL-CIO president Lane Kirkland and was discussed between Clinton and British Prime Minister John Major during their Washington summit yesterday . European nations have complained thatNAFTAand U.S. attempts to establish a similar agreement with countries across the Pacific could put them at a disadvantage.