High ground in parts of Dartmoor (3)
I believe the answer is:
tor
'high ground' is the definition.
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for tor that I've seen before include "Rot on rocky peak" , "rise" , "Rot on a hill in Cornwall" , "Rot about the rocky height" , "Rocky prominence" .)