vicar choral

noun3

1. •
   An assistant, whether cleric or lay, at an English cathedral, especially in connection with the music.
2. •
   (UK, historical) An assistant to a canon or prebendary of a collegiate church having special responsibility for the choir as opposed to the altar.

   • He managed the property of the dean and chapter, and knew what were the rights, and also what were the wrongs, of prebendaries and minor canons,—of vicars choral, and even of choristers. — 1863
3. •
   (UK) Synonym of lay clerk in certain choirs.