Russian plotters essentially bungled - they get exposed (9)

I believe the answer is:

naturists

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'they get exposed' is the definition.
The definition suggests an adverb but the answer is not.

'russian plotters essentially bungled' is the wordplay.
'essentially' says to take the centre.
'bungled' indicates an anagram.
The centre of 'plotters' is 'tt'.
'russian'+'tt'='russiantt'
'russiantt' anagrammed gives 'NATURISTS'.

Can you help me to learn more?

(Other definitions for naturists that I've seen before include "Those going naked" , "Nudists" .)

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