Artist's medium (4)
'artist's medium' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tempera that I've seen before include "Paint made using egg-yolk" , "may be useful to artist" , "vehicle" , "Emulsion paint" , "decorative style" .)
'artist's medium' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oils that I've seen before include "Painting medium" , "Lubricates; paints" , "Viscous substances kept in silo" , "Liquids for frying" , "Well-produced" .)