Key for a quick exit

ESC

This button often sits in the top-left corner of a keyboard and might save your work when things go wrong unexpectedly.

This clue plays on the idea of a "key" as both a physical object and a keyboard button. "Quick exit" hints at the Escape key (ESC), which lets you close menus or exit programs instantly. It’s a common tech reference, blending the literal meaning of "key" with its function in computing.