William Clinger Jr. graduated from The Hill School and earned a Bachelor of Arts degree from Johns Hopkins University. He subsequently obtained a Bachelor of Laws from the University of Virginia. Clinger served as an officer in the United States Navy and was admitted to the Pennsylvania bar. He transitioned to a career in private practice, gaining significant experience in the legal field.

William Clinger Jr. demonstrates an ideologically agile approach, blending traditional conservative principles with unexpected support for certain environmental regulations. His legislative record shows a highly calculated strategy to protect regional industrial interests, revealing a nuanced understanding of local economic dynamics. Clinger's rhetorical style often emphasizes community values and regional identity, framing national issues through a distinctly localized lens.