Crossword Genius

Fuel oil (9)

Ross

I believe the answer is:

petroleum

'fuel oil' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for petroleum that I've seen before include "Fossil fuel" , "Source of fuel" , "Crude oil" , "Fuel oil" , "Hydrocarbon oil" .)

I've seen this clue in The Times.
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