“Dussehra raas” presumably pertains to the celebration of the Hindu festival of Dussehra, which is also called Vijaya Dashami or Dasara. While the term “raas” (or rās) isn’t explicitly found in the search results for Dussehra, it might be an informal reference to the festivities or cultural performances, like Ramlila, held during this period to honor the victory of good over evil, especially Lord Rama’s conquest over Ravana.