Sheer rock face (9)
I believe the answer is:
precipice
(Other definitions for precipice that I've seen before include "Steep cliff face" , "Sheer cliff" , "Overhanging cliff or rock face" , "(Overhang of) steep cliff" , "Steep drop" .)
I believe the answer is:
precipice
(Other definitions for precipice that I've seen before include "Steep cliff face" , "Sheer cliff" , "Overhanging cliff or rock face" , "(Overhang of) steep cliff" , "Steep drop" .)