Petroleum product (8)

I believe the answer is:

paraffin

'petroleum product' is the definition.
(I know that paraffin is a type of petroleum product)

This is all the clue.

(Other definitions for paraffin that I've seen before include "Flammable wax" , "Possibly oil" , "Kerosene" , "Waxy flammable substance" , "Liquid fuel" .)

I've seen this clue in the USA Today, The Times, the Newsday.com and The Sun.

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