Crossword Genius

Put in A, B, C, D, or E, say? I'm naive — it's wrong (10)

Ross

I believe the answer is:

vitaminise

'put in a b c d or e say?' is the definition.
(as in Vitamins A, B, C, D or E)

'i'm naive it's wrong' is the wordplay.
'wrong' indicates anagramming the letters.
'im'+'naive'+'its'='imnaiveits'
'imnaiveits' anagrammed gives 'VITAMINISE'.

I've seen this clue in The Guardian.
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