Carthaginian witch? (3)

I believe the answer is:

hag

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'witch?' is the definition.
('hag' can be a synonym of 'witch')

'carthaginian' is the wordplay.
'HAG' is hidden within the letters.
However, I am unsure how the hidden word is indicated.

Can you help me to learn more?

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

I've seen this clue in the Evening Standard.

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