THE Clinton Administration is apprehensive that home minister L.K. Advani's "hot pursuit" policy could spark off a full-scale war. Says one official: "It would be very wrong-headed of India to commit itself to such a pro-active policy, especially if it means crossing the border into Pakistan and attacking what they claim are militant camps. We cannot condemn this strongly enough. This would be seriously upping the ante. It would be taking the conflict to a whole new level, and could lead to the kind of confrontation that both sides should avoid at all costs."