Crossword Genius

Something in the petrol around Acton East? (6)

Ross

I believe the answer is:

octane

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

'something in the petrol' is the definition.
I can't tell whether this definition defines the answer.

'around acton east?' is the wordplay.
'around' indicates an anagram.
'east?' becomes 'e' (synonyms).
'acton' is an anagram of 'octan'.
'octan'+'e'='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" , "Ingredient of petroleum" , "Hydrocarbon found in petrol - at once (anag)" , "Anti-knock element in petrol" .)

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