If you Google "Salome Wagner" (without the quotes) you will discover that quite a few people seem to have that name.
What you will not discover, however, is that Richard Wagner wrote the opera "Salome", as stated on Jeopardy! last night.
In a Wagner opera, it's heads up for Jochanaan, who is this Biblical figure.That's because the opera "Salome", which features the character Jochanaan, aka (as the clue was asking) John the Baptist, was written by another German guy called Richard: Strauss. (Libretto based on Oscar Wilde's play.)
Shame on you, Clue Crew!
(Thanks, Kathie: this is why I hate to leave the room during the show!)