Upland area: morbid rocks framing ghastly moon (6,4)

I believe the answer is:

bodmin moor

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'upland area' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.

'morbid rocks framing ghastly moon' is the wordplay.
I cannot really see how this works, but
an anagram of 'moon' is 'nmoo' which is located in the answer.
an anagram of 'morbid' is 'bodmir' which is present in the left over letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Independent.

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