My pro unit arranged bribery (10)

I believe the answer is:

corruption

'bribery' is the definition.
(thesaurus)

'my pro unit arranged' is the wordplay.
'my' becomes 'cor' (both are expressions of surprise).
'arranged' is an anagram indicator (letters rearranged).
'pro'+'unit'='prounit'
'prounit' with letters rearranged gives 'ruption'.
'cor'+'ruption'='CORRUPTION'

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