How can I remove an autocomplete suggestion from Safari's address bar?

1. Open Safari.
2. From the “History” menu, choose “Show All History”.
   • keyboard shortcut: ⌘ Y
3. In the Search field in the top right corner, enter the web site you want to remove.
4. In the list of search results, click on the web site you want to remove.
   • To select multiple sites, hold the command ⌘ key while clicking on the sites you want to delete. Or, to select a range, hold the shift key, click the first item to delete, then click the last item to delete.
5. Press the Delete key on your keyboard.

• Start by typing in the website into the Safari URL bar "example Gmail".

• Then at the bottom of the suggestions it'll show you Search for 'gmail' in History.

• Click that option and then select all and press delete.

Worked like a charm for me.

deleting it from my bookmarks worked for me.

backstory: typing yah for yahoo.com autofilled yahooligans.com (safari 8.0.7 on yosemite 10.10.4).

fix: found it deep in a sub menu in the bookmarks folder and erased it. now typing yah fills yahoo.com. woo hoo and thanks!