BILL Clinton was booed Wednesday night when he took the stage at the Beacon Theater at the start of a Willie Nelson concert. "The place went wild when [Clinton] was announced," said our spy. "There was loud booing and yelling." Clinton "seemed angered" and made a comment about "angry Republicans," which stirred the crowd on more. "There was so much anti-Clinton booing and yelling that when Willie came back out, he asked if everyone was all right . . . the concert was taped for a Memorial Day showing on the USA network, but even with serious editing, it will...