By David French NEW YORK (Reuters) – Wall Street put a seesaw day behind it to close higher on Wednesday, as investors digested new clues on the U.S. central bank’s approach to rate policy and its inflation fight detailed in the minutes from the latest Federal Reserve meeting. After a brutal selloff in global equity markets in the first half of the year, nervous investors are keeping a close watch on central bank actions as they try to assess the impact of aggressive rate hikes on global growth. They got their latest data point on Wednesday afternoon, when the minutes of the June 14-15 policy …