In what paragraph? I guess you are missing some details. Please, double check your question, so we could try to answer it.
Noun clauses are dependent clauses and can serve the role of the subject in a sentence. In this cause, the noun clause is "whomever wins the Spirit Award". The person winning the spirit award is doing an action, so they are the subject of the sentence.
The character of Mr. Flosky is apparently based on the poet Samuel Taylor Coleridge. In fact all the characters are mouthpieces for Peacock's wit and satire. The main one, Scythrop, is based on Peacock's friend, the poet Percy Bysshe Shelley, and is more a case of Peacock humorously poking fun than a bitter parody.
Use where? I don’t know what source you got this from, so next time be sure to put the passage in so I can read it.
Ima tryna get these same answers for my Brit. World Lit. class for k12