The witch of Carthage (3)

I believe the answer is:

hag

'the witch' is the definition.
(synonyms)

'of carthage?' is the wordplay.
'of' indicates a hidden word.
'HAG' is hidden within 'carthage'.

(Other definitions for hag that I've seen before include "Witch or ugly old woman" , "Old witch-like woman" , "Crone" .)

I've seen this clue in the Evening Standard.

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