Crossword puzzle clue "store rows"

One who rows, rows, rows the boat

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

Rows of rows

Store rows

Like a store during store hours

It has a separate men's store opposite its main store in Chicago

The "L" in this store's logo hints at the store's name

First four rows