Crossword Genius

Gas rating (6)


I believe the answer is:


'gas rating' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for octane that I've seen before include "chemical" , "Ingredient of petroleum" , "A liquid hydrocarbon found in petroleum" , "Flammable hydrocarbon - at once (anag)" , "One cat with hydrocarbon compound occurring in petrol" .)

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