Incredibly confused laymen with no help (12)

I believe the answer is:

phenomenally

'incredibly' is the definition.
(thesaurus)

'confused laymen with no help' is the wordplay.
'confused' is an anagram indicator.
'with' says to put letters next to each other.
'laymen'+'no'+'help'='laymennohelp'
'laymennohelp' with letters rearranged gives 'PHENOMENALLY'.

(Another definition for phenomenally that I've seen is " Extraordinarily".)

I've seen this clue in The Telegraph.

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