I found it !!!!!!

On the left side of the URL there is an info icon (i) or a lock icon. Click the icon and then [web site configuration].

You will find a trash icon to clear cache of the current site, and alternatively a "restore preferences" button.

Working on Android Chrome 71.

On the left side of the URL, there is an info icon (i) or a lock icon. Click the icon and then [web site configuration].

You will find a trash icon to clear the cache of the current site, and alternatively a "restore preferences" button.

Working on Chrome for Android v71.