Watch Victor swapping places with son? The opposite (7)

I believe the answer is:

obverse

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

I cannot understand how the remainder of the clue works.

(Other definitions for obverse that I've seen before include "Penny may present such a face" , "One side of a coin" , "Verbose about coin side" , "Side of a coin that shows the head" , "Face of a coin" .)

I've seen this clue in The Independent.

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