Complex sentence: Wickham leads Elizabeth and the neighbourhood to believe that he has been unfairly treated by Darcy, claiming that Darcy denied him a living as a clergyman that was promised him by Darcy's late father.
Split into simpler sentences: Wickham leads Elizabeth and the neighbourhood to believe that he has been unfairly treated by Darcy. He claims that Darcy denied him a living as a clergyman that was promised to him by Darcy's late father.