Archdeacon to collaborate dishonestly (7)

I believe the answer is:

venally

'dishonestly' is the definition.
(synonyms)

'archdeacon to collaborate' is the wordplay.
'archdeacon' becomes 'ven' (abbreviation for The Venerable).
'to collaborate' becomes 'ally' (ally can mean to collaborate or work with someone).
'ven'+'ally'='VENALLY'

I've seen this clue in The Telegraph.

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