Circle plate was on one side of table and is now on the other side (8)

I believe the answer is:

turncoat

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(Other definitions for turncoat that I've seen before include "Traitor with reversed garment" , "One betraying party" , "Actor nut may be a traitor" , "treacherous as one?" , "Traitor with inverted garment" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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