Many unnatural shocks for VIP (6)

I believe the answer is:

bigwig

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

'vip' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for bigwig that I've seen before include "Important person (slang)" , "Important person with large toupee" , "Luminary" , "What may lie ahead largely" , "Personage" .)

I've seen this clue in The Sun.

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