1) DW Griffith product 2) Certain choir singers 3) Certain operatic voices 4) Certain singers 5) Choir group 6) Choir members 7) Choir singers 8) Choral voices 9) Chorus members 10) Chorus voices 11) Countertenors 12) Height prefix 13) Height starter 14) High combiner 15) High prefix 16) High to the left Found on https://www.crosswordclues.com/clue/alti