US codes broken in Cape Verde’s capital (7)

I believe the answer is:

escudos

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

'cape verde's capital' is the definition.
I can't tell whether this defines the answer.

'us codes broken' is the wordplay.
'broken' is an anagram indicator.
'us'+'codes'='uscodes'
'uscodes' anagrammed gives 'ESCUDOS'.

'in' acts as a link.

Can you help me to learn more?

(Another definition for escudos that I've seen is " Old Portuguese coins".)

I've seen this clue in The Times.

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