Not sure what happened here but -
Went to clip a page and the Webclipper extension icon, which is normally in the first position next to the omnibox, was no longer there. In it's place was a "Save to Keep" icon.
I don't remember putting Keep in that location. When I went to the extensions page it had a Reload button next to it and the Webclipper returned.
Running Chrome 70.0.3538.77, recently updated, on Windows 10