Crossword Genius

Solvent spilled at once (6)

Ross

I believe the answer is:

octane

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'solvent' is the definition.
The answer and definition can be both substances as well as being singular nouns.
Perhaps there's a link between them I don't understand?

'spilled at once' is the wordplay.
'spilled' indicates anagramming the letters.
'at'+'once'='atonce'
'atonce' anagrammed gives 'OCTANE'.

Can you help me to learn more?

(Other definitions for octane that I've seen before include "Fuel component in McLaren vehicle" , "Anti-knock rating" , "Petrol quality rating" , "A liquid hydrocarbon found in petroleum" , "Ingredient of petroleum" .)

I've seen this clue in The Times.
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