Abnormal condition a carnet may be in (6)

I believe the answer is:

trance

I'm a little stuck... Click here to teach me more about this clue!

'abnormal condition' is the definition.
'trance' can be an answer for 'condition' (trance is a kind of condition). I'm not sure about the 'abnormal' bit.

'a carnet may be in' is the wordplay.
'carnet' can be anagrammed to 'TRANCE'.
But, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for trance that I've seen before include "Reverie" , "Mesmerised state" , "Canter (anag.)" , "Canter into state of hypnosis" , "Nectar (anag)" .)

I've seen this clue in the Evening Standard.

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