Delusion about being immaculate (8)

I believe the answer is:

unsoiled

'immaculate' is the definition.
(thesaurus)

'delusion about' is the wordplay.
'about' indicates anagramming the letters.
'delusion' is an anagram of 'UNSOILED'.

'being' is the link.

(Another definition for unsoiled that I've seen is " Not stained or dirty".)

I've seen this clue in The Independent.

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