Boris Johnson is one in pieces, upset with court (11)

I believe the answer is:

euro-sceptic

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(Other definitions for euro-sceptic that I've seen before include "One against being 'ruled from Brussels'" , "Today's Little Englander?" , "Not in favour of the EU" , "One opposed to EU power" , "Proponent of UK self-determination" .)

I've seen this clue in The Guardian.

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