Psychics at vicar's, only in disguise! (12)

I believe the answer is:

clairvoyants

'psychics' is the definition.
(clairvoyant is a kind of psychic)

'at vicar's only in disguise' is the wordplay.
'in disguise' is an anagram indicator.
'at'+'vicars'+'only'='atvicarsonly'
'atvicarsonly' is an anagram of 'CLAIRVOYANTS'.

I've seen this clue in The Times.

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