
1) Ancient Greek vase painter 2) Anonymous artist of antiquity
Found on
https://www.crosswordclues.com/clue/pioneer-group

The Pioneer Group were a number of red-figure vase painters working in Kerameikos or the potters` quarter of Athens around the beginning of the 5th century BCE. Characterized by John Boardman as perhaps the first conscious art movement in the western tradition, the group comprised the painters Euphronios, Euthymides, Smikros, Hypsias, the `Dikai.....
Found on
http://en.wikipedia.org/wiki/Pioneer_Group
No exact match found.