Petrol station (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
garage
'petrol station' is the definition.
(as in a petrol garage)
This is all the clue.
(Other definitions for garage that I've seen before include "Attachment to the house" , "Source of 4 dn or 16 dn" , "Carport" , "Car storage area" , "Room for car" .)