Moderate leader being upturned — uncivilized! (4)

I believe the answer is:

wild

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'uncivilized' is the definition.
(I know that uncivilized can be written as wild)

I don't understand the remainder of the clue.

(Other definitions for wild that I've seen before include "Born Free?" , "Feral - crazy" , "Fierce" , "unruly" , "Undomesticated" .)

I've seen this clue in The Times.

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