It gives us the gas we need to step on it (9)

I believe the answer is:

petroleum

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'it gives us the gas we need to step on it' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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

I've seen this clue in The Irish News.

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