ICE CREAM (62A. Cold treat that can precede the last word of 18-, 23-, 40- or 50-Across), SPACE BAR (18A. It’s directly below V-B-N-M), TRAFFIC CONE (23A. Highway safety marker), KNUCKLE SANDWICH (40A. Punch in the mouth, slangily) and PARADE FLOAT (50A. Homecoming display) are the interrelated group of this tasty