Crude stone artifact (6)
I believe the answer is:
eolith
'crude stone artifact' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for eolith that I've seen before include "Very early stone implement to be found in the oil" , "Flint" , "Elvis Presley song" , "Old stone implement" , "stone tool" .)