An ancient enemy of mean disposition (6)

I believe the answer is:

foeman

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'an ancient enemy' is the definition.
'foeman' can be an answer for 'enemy' (I've seen this in another clue). I am not certain of the 'an ancient' bit.

'of mean disposition' is the wordplay.
'disposition' indicates anagramming the letters.
'of'+'mean'='ofmean'
'ofmean' anagrammed gives 'FOEMAN'.

Can you help me to learn more?

(Other definitions for foeman that I've seen before include "Enemy in war" , "Archaic male enemy" .)

I've seen this clue in the Evening Standard.

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