£1000? That’s good money for an Afrikaner (5)

I believe the answer is:

grand

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'ps1000?' is the definition.
I can't tell whether this definition defines the answer.

'good money for an afrikaner' is the wordplay.
'good' becomes 'g' (abbreviation).
'money for an afrikaner' becomes 'rand' (currency of South Africa).
'g'+'rand'='GRAND'

'that's' is the link.

Can you help me to learn more?

(Other definitions for grand that I've seen before include "Magnificent, imposing" , "1000, colloquially" , "Splendid - piano" , "Piano; thousand pounds" , "principal" .)

I've seen this clue in The Times.

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