Here are a few possibilities for what the person might have actually meant:
* "Would you spell me while I'm out?": This would make sense if the person is going to be away for a while and needs someone to spell (substitute) them in their current task or responsibility.
* "Would you spell [something] for me while I run into town?": This would be more likely if they're asking for someone to spell a word or phrase for them while they're gone.
* "Would you spell [someone's name] for me while I run into town?": This would be a request to spell someone's name while they're gone, perhaps for someone who's unfamiliar with the spelling.
It's important to consider the context and the speaker's intent to understand the meaning. If you're unsure, you can always ask the person to clarify what they meant.