MS Excel
If you need to remove only the formatting done in a range (numbers and formula typed there should not be removed), you must

Click on Remove Formatting tool on Standard Toolbar
From Edit menu choose Clear and then Formats
Double click the Format Painter and then press Esc key in keyboard
From Edit menu choose Delete

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MS Excel
Right clicking something in Excel:

Nothing the right mouse button is there for left handed people
Opens a shortcut menu listing everything you can do to the object
Selects the object
Deletes the object

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