Deep, narrow valley (6)
I believe the answer is:
ravine
(Other definitions for ravine that I've seen before include "Steep-sided gorge" , "Deep narrow valley" , "Type of gorge" , "Vainer in narrow gorge" , "'Deep, steep valley (6)'" .)
I believe the answer is:
ravine
(Other definitions for ravine that I've seen before include "Steep-sided gorge" , "Deep narrow valley" , "Type of gorge" , "Vainer in narrow gorge" , "'Deep, steep valley (6)'" .)