Crossword Genius

Frank talking away, gave address west of Northern Cape (13)

Ross

I believe the answer is:

outspokenness

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'address west of northern cape' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'frank talking away' is the wordplay.
'frank' becomes 'outspoken' (synonyms).
'talking away' becomes 'ness' (I can't justify this - if you can you should believe this answer much more).
'outspoken'+'ness'='OUTSPOKENNESS'

'gave' is the link.

Can you help me to learn more?

(Other definitions for outspokenness that I've seen before include "Lack of verbal restraint" , "Candour" .)

I've seen this clue in The Telegraph.
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