Brain substance, and a hint to the ends of 17- and 37-Across and 11- and 28-Down 10 letters

Crossword clues for Brain substance, and a hint to the ends of 17- and 37-Across and 11- and 28-Down 10 letters:

GRAYMATTER: Brain substance, and a hint to the ends of 17- and 37-Across and 11- and 28-Down