The crossword solution for the term 'CANYON REPLY' is 'ECHO'. An ECHO is a sound or voice that is reflected off of a surface and heard again by the listener. It is often used in literature and poetry to create a sense of atmosphere. In nature, echoes are created when sound waves bounce off of objects such as mountains, canyons, and other large surfaces. This is why the term 'CANYON REPLY' was used to describe the answer 'ECHO'.