Complete change of policy (5-4)

I believe the answer is:

volte-face

(Other definitions for volte-face that I've seen before include "Sudden and complete reversal of position" , "A complete change of mind or attitude" , "Complete or sudden change of attitude" , "About-face, major change of attitude" , "A complete chnage of mind or attitude" .)

I've seen this clue in The Guardian.

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