Regularly admits damp's turning out critical (12)

I believe the answer is:

disapproving

'critical' is the definition.
(criticising something is disapproving of it)

'regularly admits damp's turning out' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'turning out' becomes 'proving' ('prove' can be a synonym of 'turn out').
'admits'+'damps'='admitsdamps'
The alternate letters of 'admitsdamps' are 'disap'.
'disap'+'proving'='DISAPPROVING'

I've seen this clue in The Telegraph.

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