I invent an unusual solution to a snake bite? (9)

I believe the answer is:

antivenin

'solution to a snake bite?' is the definition.
(treatment for venom)

'i invent an unusual' is the wordplay.
'unusual' is an anagram indicator.
'i'+'invent'+'an'='iinventan'
'iinventan' is an anagram of 'ANTIVENIN'.

I've seen this clue in The Guardian.

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