Placebo that displays S African PM (5)

I believe the answer is:

botha

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's african pm' is the definition.
I don't know anything about this answer so I cannot tell whether it can be defined by this definition.

'placebo that displays' is the wordplay.
'displays' indicates a hidden word (part of the clue displays the answer).
'BOTHA' can be found hidden inside 'placebo that'.

Can you help me to learn more?

(Other definitions for botha that I've seen before include "PM in Africa" , "former South African general" .)

I've seen this clue in the Sydney Morning Herald.

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