Thanks. I have now placed it on the Application Launcher so I'm happy but shouldn't it have been added there automatically?
I remember when openclipart would install and be available under Gallery in Libreoffice..
Now just open libreoffice>writer>gallery>new theme>find files and point to user/share/images/openclipart add what files you want ( I chose add all).
You can name this new Theme what ever you like.