Crossword puzzle clue "squares and cubes e g abbr"

Squares and cubes, e.g.: Abbr.

Course with squares and cubes

The squares of "three squares"

Ice cubes?: Abbr.

Web concerns ... and based on six familiar names hidden in rows 1, 4, 12 and 15 of this puzzle grid, what the black squares in those rows symbolize

Sketch show created by David Walliams and Matt Lucas ... and a hint to eight squares in this puzzle

Up-and-comers, and what the circled squares contain

Freezer component with "crushed" and "cubes" options