What is an appositive context clue?

An appositive context clue is a type of context clue used in reading comprehension to help a reader understand the meaning of a word by providing additional information about the word using a descriptive phrase or clause. The appositive phrase or clause is placed next to the word it describes and uses commas to separate it from the rest of the sentence. The appositive can provide information about the identity, attributes, or characteristics of a person, object, or idea, and it serves to clarify any ambiguity that may exist in the sentence. For example, in the sentence "My friend, a skilled carpenter, built me a new bookshelf," the appositive phrase "a skilled carpenter" provides information about the identity and skills of the friend who built the bookshelf.