Hi there! Thanks for posting in the community. Unfortunately there isn't a way to clear this list. But if you'd like you can add the idea to our feature request form to bring it to the attention of our product team so they can consider it. As a workaround I would recommend typing out at least a couple letters of the email address you are trying to share with so it narrows down your options and minimizes the chance of selecting the wrong one. Hope this helps and thanks for your request!