You can flag your question for moderator attention by clicking on the little grey "flag" link under your post and then choosing "in need of moderator intervention". A little box will pop up that will allow you to explain your intentions to the moderator handling your flag. Mods generally know what to do in such cases and can help you.
But you have a couple options here, though it depends on how the moderator or SE staff member perceives your request:
- Disassociate yourself from the question using the "Contact" form
It is possible to disassociate yourself from a post so that your name will not be mentioned together with the question. It will not display on your profile anymore and instead a "community" user will own it. More information can be found on MSE:
How do I remove my name from a post, in accordance with CC BY-SA 3.0?
Basically you click on the "Contact" link at the bottom of the page and describe why you would like to be disassociated from the post.
Your name will still pop up in chat messages or comments that have mentioned you, so it won't necessarily bring you the kind of anonymity you want. This meta post for example will still point to it. But it would probably help if your goal is to be less visible.
- Ask a mod with a mod flag for deletion
The question, together with all provided answers, can be deleted by a mod. Though it won't really be deleted. It will still be visible for everyone with more than 10k reputation once the site graduates. Currently 2k reputation is enough to see deleted posts. It could also get undeleted. By deleting the post lots of people will be affected. Everyone who had an answer there with upvotes will lose reputation. As the question wasn't closed the community seems to think that your question is generally useful for other people, so removing it will remove valuable content from the site. This is something to keep in mind that might very well make a moderator say "No" to your request.