Supervised old archdeacon, suppressing language (8)

I believe the answer is:

overseen

'supervised' is the definition.
(I've seen this before)

'old archdeacon suppressing language' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'archdeacon' becomes 'ven'.
'suppressing' indicates putting letters inside.
'language' becomes 'erse' (Erse is an example).
'ven' placed around 'erse' is 'verseen'.
'o'+'verseen'='OVERSEEN'

(Another definition for overseen that I've seen is " Supervised".)

I've seen this clue in The Times.

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