(18A. Cow or goat); SPACE BAR (57A. Long key). Mid-size -- AFRAME (34D. Simple building); ASSORT (47D. Categorize); BEAMED (20A. Showed joy, in a way); CIRRUS (64A. It's white and fleecy) ; COINOP (30D. Pinball machine, e.g.); DEAFTO (3D. Not heeding); EMBALM (21D. Mummify) ; GLIBLY (45D. With a silver tongue);