Something in the petrol around Acton East? (6)
I believe the answer is:
octane
'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" .)