The sentence is, "Listen to what she has to say." "To" is clearly a preposition, and "what she has to say" is clearly the prepositional complement. This is where I'm having trouble. How do I analyze "what she has to say". For example, is "what she has to say" a subordinate clause, or is it a noun phrase? This article calls it a subordinate clause, but I have my doubts. "What" doesn't seem like a subordinator in this context, because it seems to have a lexical meaning (Contrast "what" with "that" in the sentence, "He says that the leaves are brown"), and "she has to say" doesn't seem capable of standing on its own. So is it a noun phrase? If so, how do I analyze it? Thank you in advance for your time!