Row, after internal turmoil, to the geological feature (5)
I believe the answer is:
scarp
This clue might be a double definition.
'row after internal turmoil' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's a link between them I don't understand?
'the geological feature' is the second definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for scarp that I've seen before include "slippery slope" , "Steep bank" .)