Deduce nitric oxide caused fire (7)

I believe the answer is:

inferno

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'fire' is the definition.
(I know that inferno is a type of fire)

'deduce nitric oxide' is the wordplay.
'deduce' becomes 'infer' (synonyms).
'nitric oxide' becomes 'NO' (NO is the chemical formula for nitric oxide).
'infer'+'no'='INFERNO'

'caused' is the link.
This may not be right. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for inferno that I've seen before include "A raging fire like hell" , "Hellish conflagration" , "Large dangerous fire" , "Huge fire" , "Fierce fire" .)

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

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