A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Well, the Clear Filter button in the Filter pane is inactive because there is no data & no filter is applied. That button only removes the filtering [i.e., restores the records] that has been applied on the column.
If you want to turn the Filter feature off altogether click in the range then either
- Go to the Data tab of the Ribbon
- Click the big Filter button or
- Go to the Data menu
- Click Filter top remove the check