Natural resource? (3)
'natural resource' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oil that I've seen before include "what can be seen on iceberg" , "Black gold" , "Anoint" , "Viscous substance for lubrication" , "Viscous substance as lubricant" .)
'natural resource?' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ore that I've seen before include "Mined material" , "Mineral-bearing rock" , "store of value" , "Mineral containing valuable metal" , "Mineral-bearing material" .)