A charmer with wit and a bit of charisma (5)

I believe the answer is:

witch

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'a charmer' is the definition.
(someone who charms)

'wit and a bit of charisma' is the wordplay.
'and' means one lot of letters go next to another.
'a bit of charisma' becomes 'ch' (I can't explain this - if you can you should believe this answer much more).
'wit'+'ch'='WITCH'

'with' is the link.

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(Other definitions for witch that I've seen before include "Bad speller!" , "Enchantress" , "Female member of coven" , "Hag, crone" , "charming female" .)

I've seen this clue in the Evening Standard.

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