Today’s Wiki-est Amazonian Googlies Acrossīack in Ireland, the “pavement” is what we call the “sidewalk, footpath” (because the footpath is “paved”, often with “paving” stones!).
Swapping those abbreviations (DAY TRADING) within each pair gives us two common phrases: Each starts with an abbreviation for a day of the week. Themed answers come in pairs, side by side in the grid.