Something filling you can get at the station (6)

I believe the answer is:

petrol

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'station' is the definition.
(petrol station is a kind of station)

I don't understand the remainder of the clue.

(Other definitions for petrol that I've seen before include "Fuel for the internal combustion engine" , "Fuel for road vehicles" , "Common motor fuel" , "The juice" , "Liquid fuel" .)

I've seen this clue in the Evening Standard.

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