Crossword puzzle clue "bank of 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

Bank of rows

Cost of a bank transaction that's not with one's own bank

One making bank-to-bank transfers?

It goes from bank to bank

West Bank bank