The European Commission on Wednesday gave a conditional green light to the massive tie-up between Swiss mining giant Xstrata and commodities trader Glencore that would create a global leader. \"The clearance is conditional on the termination of Glencore\'s off-take arrangements for zinc metal in the European Economic Area with Nyrstar, the world\'s largest zinc metal producer, and the divestiture of Glencore\'s minority shareholding in Nyrstar,\" it said in a statement.