Painting medium (4)
'painting medium' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for oils that I've seen before include "Lubricates; paints" , "Liquids for frying" , "Lubricants stored in silo" , "Well-produced" , "Painting medium" .)
'painting medium' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tempera that I've seen before include "Egg-yolk and water painting medium" , "Emulsion paint" , "Painting method using emulsion" , "Type of paint" , "decorative style" .)