Parts of camphor gas mixture can be explosive! (6)

I believe the answer is:

orgasm

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'be explosive' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'parts of camphor gas mixture' is the wordplay.
'parts' indicates a hidden word (I've seen 'part' mean this).
'ORGASM' is hidden within 'of camphor gas mixture'.

'can' is the link.

Can you help me to learn more?

(Other definitions for orgasm that I've seen before include "Practising conjugation may achieve it" , "Immoderate excitement" , "Fit of intense excitement" , "Bout of intense excitement" .)

I've seen this clue in The Guardian.

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