Is an obvious typo, it there a way to merge it with upload or eliminate it?
Or should I flag it for moderator attention?
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That misspelled tag was only used once, in such cases it is far easier to just change it by hand. The misspelled tag will be removed automatically after some time (~24 hours), if no question is using it anymore.
I did that for the one question where it was used just now.
If a tag that is used by a significant number of question (>10-20) is misspelled or needs to be renamed, you should post it on meta like you did now. Moderators can rename tags or merge misspelled tags into other tags. But for a hardly-used tag it's not worth it to use these moderator abilities, they are pretty dangerous and not easily undone.
Commenting and notifying the OP is the easiest option if you don't have edit/retag privileges,
Edit: As I see, you have edit privileges. Just edit the tag on the question. Not used tags will cease existence anyway.