Complex sentence: A singer who has applied for an opening at Fish Mooney's night club and subsequently an agent for Mooney to seduce and kill Don Falcone, she is uncovered by Oswald Cobblepot, who uses her for his own purposes.
Split into simpler sentences: A singer who has applied for an opening at Fish Mooney's nightclub and subsequently an agent for Mooney to seduce and kill Don Falcone. She is uncovered by Oswald Cobblepot, who uses her for his own purposes.