The Clue F1 neighbour
The Answer ESC
The answer "ESC" fits the clue "F1 neighbour" because ESC is located right next to the F1 key on a standard keyboard. The F1 key is often used for help functions in software, while ESC is used to exit or cancel actions. This makes them neighbors in terms of their placement on the keyboard. So, when you think about the layout of keys, ESC is the perfect answer!