A clinching sentence is a summarizing statement placed at the end of the paragraph. It typically paraphrases a position first offered in the opening sentence. While the clinching sentence is used to restate the main topic, it sometimes adds supporting details.
An effective clinching sentence is based on a progressive construction of a paragraph, which typically begins with an opening sentence that clearly introduces the main point. The sentences that make up the body of the paragraph introduce information or evidence in a logical order. This is often done through elaborating, comparing and contrasting, emphasizing important points and repeating essential information for reinforcement.