Steep gorge (6)
I believe the answer is:
canyon
(Other definitions for canyon that I've seen before include "(N. Am.) ravine" , "Big rift" , "river valley" , "Gulch" , "Deep valley with steep, even Grand, slopes" .)
I believe the answer is:
canyon
(Other definitions for canyon that I've seen before include "(N. Am.) ravine" , "Big rift" , "river valley" , "Gulch" , "Deep valley with steep, even Grand, slopes" .)