Crossword Genius

What presumably inspired UKIP with right to destroy Britain's sense of well-being? (8)

Ross

I believe the answer is:

euphoria

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'well-being?' is the definition.
(thesaurus)

I don't understand the rest of the clue.

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(Other definitions for euphoria that I've seen before include "Intense happiness and elation" , "Delight" , "In high spirits" , "Feeling of extreme elation" , "Feeling of general happiness" .)

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