First, you need to know that a noun clause, is a sentence that is current as a noun, naming something. This type of sentence can take the position of a grammatical class.
In the case of the phrase shown in the question above, the noun clause is "what you said", which acts as an indirect object.
The indirect object is the element of a sentence that gives complement and meaning to the verb to which it refers. In this case, the clause "what you said" gives meaning to the expression "I will give", which presents the verb "to give" which needs a complement to give the phrase coherence and cohesion.
