The crossword solutions for the term 'CERTAINLY NOT A GENTLEMAN' are CAD, which stands for 'civilian airman's document'. This document is issued by the United States Air Force to members of the Air Force Reserve and Air National Guard. It serves as a form of identification and is required for access to certain military facilities. The term 'CERTAINLY NOT A GENTLEMAN' implies that the holder of the CAD is not a gentleman, suggesting that they may not be held to the same standards of behavior as a gentleman would be.