Ярослав Дикий

 function aclean(arr){
     var obj = {};

     for(var i = 0; i < arr.length; i++){
       var sorted = arr[i].toLowerCase().split('').sort().join('');
       obj[sorted] = arr[i];
     }

     var result = [];

     for(var key in obj){
       result.push(obj[key]);
     }
     return result;
   }

   var arr = ["clockwise", "owe clicks", "киборг", "Гробик", "тор", "РОТ"];
   alert(aclean(arr));