A university citation then redrafted a task for a notary (14)

I believe the answer is:

authentication

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'a task for a notary' is the definition.
I can't tell whether this defines the answer.

'a university citation then redrafted' is the wordplay.
'university' becomes 'U' (abbreviation for university).
'redrafted' is an anagram indicator (to redraft something is to improve or rewrite it).
'citation'+'then'='citationthen'
'citationthen' with letters rearranged gives 'thentication'.
'a'+'u'+'thentication'='AUTHENTICATION'

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(Another definition for authentication that I've seen is " Process of proving genuine".)

I've seen this clue in The Times.

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