“Scrub the mission!” WSJ Crossword Clue

Think of what you might do to a space launch if something goes wrong at the last minute.

To ????? means to stop an action or process before it is completed.

The clue uses the phrase 'Scrub the mission!' which is a common expression in aerospace and military contexts to mean canceling or stopping an operation. '?????' is the term often used to describe this action, especially when referring to launching or executing a mission.

Command from space command, Halt, scrub, Abandon prematurely, as a mission, Liftoff-canceling command, Cancel, as a space launch