Try trick is to save the clip art to your computer (assuming you have permission and copyright clearance to do this),
then in powerpoint, insert picture from file

Cheers
TAJ Simmons
microsoft powerpoint mvp

awesome - powerpoint backgrounds,
free powerpoint templates, tutorials, hints and tips etc
http://www.powerpointbackgrounds.com

If you insert a new slide that has the clipart insert on
it and then double click on it, it will go out to the
internet and search for clipart. I do not want this to
happen and I was wondering if anyone know how to turn it
off?