start-over button
nounUK /ˈstɑːt əʊvə ˈbʌtn/
US /ˈstɑːrt oʊvər ˈbʌtn/
A button you press to begin something again from the beginning.
When the game went wrong, she pressed the start-over button.
OTHER MEANINGS
2. A chance to try something again from the beginning.
After the failed project, the team got a start-over button.
3. A control that clears a device or program back to its first settings.
Press the start-over button to clear the score.
4. A way to begin a new part of life after a big change.
Moving to a new town felt like a start-over button for him.