A dark mystery somewhere in Africa (5)

I believe the answer is:

dakar

I'm a little stuck... Click here to teach me more about this clue!

'in africa' is the definition.
('Dakar' is part of 'africa')

'a dark mystery' is the wordplay.
'mystery' indicates anagramming the letters.
'a'+'dark'='adark'
'adark' with letters rearranged gives 'DAKAR'.

'somewhere' acts as a link.
I am not very happy about this link. It may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for dakar that I've seen before include "Senegal's capital" , "Capital of Senegal" , "place in Africa" .)

I've seen this clue in the Evening Standard.

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