No friend of the earth! (5)

I believe the answer is:

hater

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'no friend' is the definition.
The answer and definition can be both people as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'of the earth' is the wordplay.
'of' indicates an anagram (the answer comes from or 'of' the letters).
'earth' with letters rearranged gives 'HATER'.

Can you help me to learn more?

(Other definitions for hater that I've seen before include "Heart (anag.)" , "One who shows intense dislike" , "One loathing" , "Antipathetic type" , "Unpleasant type" .)

I've seen this clue in the Evening Standard.

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