WORLD WIDE WEBS
'(<a href="http://www.j-archive.com/media/2009-07-07_J_25.wmv">Kelly of the Clue Crew shows an animated diagram of a spider completing a web on the monitor.</a>)  The catching spiral is covered with a sticky substance & stops short of the center of the web, known as this 3-letter word, just like the middle of a wheel'
hub