Drugged unconsciousness in Cairns so bad? (8)

I believe the answer is:

narcosis

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

'drugged unconsciousness' is the definition.
'narcosis' can be an answer for 'unconsciousness' (narcosis is a kind of unconsciousness). I am not certain of the 'drugged' bit.

'cairns so bad?' is the wordplay.
'bad?' indicates anagramming the letters (I've seen 'bad' mean this).
'cairns'+'so'='cairnsso'
'cairnsso' anagrammed gives 'NARCOSIS'.

'in' is the link.

Can you help me to learn more?

(Other definitions for narcosis that I've seen before include "Drug effect" , "Condition of deep stupor caused by chemicals" , "suffering from drugs" , "Drugged stupor (medic.)" , "result of excess speed?" .)

I've seen this clue in the Sydney Morning Herald.

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