Crossword Genius

Show how to upset collected VIPs (4,3)

Ross

I believe the answer is:

whos who

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

'show how to upset collected vips' is the definition.
I can't judge whether this definition defines the answer.

'show how to upset' is the wordplay.
'to upset' indicates an anagram.
'show'+'how'='showhow'
'showhow' anagrammed gives 'WHOS WHO'.

Can you help me to learn more?

(Other definitions for whos who that I've seen before include "Celebrities' reference book" , "Directory of people" , "short lives" , "only important ones here" , "collection of biographies" .)

I've seen this clue in The Independent.
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