Tom Clancy was an American author and video game designer best known for his military-themed techno-thriller novels. His works, such as 'The Hunt for Red October' and 'Patriot Games, ' have been adapted into films. He also created the popular video game series 'Rainbow Six.' His most famous character is Jack Ryan, a former CIA analyst who appears in many of his books. The crossword solutions for Tom Clancy are RYAN (4 letters) and CLEAR (5 letters), both of which refer to Jack Ryan.