I'm not partly drunk notably (11)

I believe the answer is:

importantly

'notably' is the definition.
(thesaurus)

'i'm not partly drunk' is the wordplay.
'drunk' is an anagram indicator.
'not'+'partly'='notpartly'
'notpartly' anagrammed gives 'portantly'.
'im'+'portantly'='IMPORTANTLY'

I've seen this clue in The Independent.

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