Safe can mean a few things depending on the context, but based on the clue "Call upon arriving home, maybe," it suggests that it is referring to a safe as a secure box or container used to protect valuables. It is often found in homes and provides security by locking access to the contents inside.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: What a crackerjack cracker jacks. Explanations are generated by AI and may be inaccurate.