oil with medicinal properties), TSARINA (10D. Sovereign of yore ) . Five-letter — ACNED, AMEBA (5A. Biology class topic), DELFT,DRIES, HEARS, IMAGE, PEARL and PEARY, ROBOT (45A. Steel worker?) , SHIED, SIRED, SNEER . Short stuff — ABE, AIT, ALSO, AMAT, AMOI, AMYS, ANDI, ANNO, APIS, ARI, ASK, CYTE, DIY, DSOS,