Double-click, as a file

OPEN

Think of what you do to access a document or program after selecting it with your mouse. This action is often paired with a single click to highlight.

The clue plays on the idea of "double-clicking" a file on a computer, which is the common action to open it. Instead of describing the physical click, it uses "double-click" as a noun-like hint for the result—what you’re actually doing when you perform that action. The answer "OPEN" fits because that’s the command or outcome of double-clicking, even though the clue phrases it as a verb. It’s a straightforward tech reference where the action’s name stands in for its effect.