Where are your clips coming from? What type of files are they? What recorded them? How are you importing them into your project? Why is there silence between them?
Zoom in on the timeline, you might see a small fade transition on the trailing and leading edges of the audio events. If so, hover your mouse over the top corners of each event until it changes you can then drag the fade to the end of the event to get rid of it.
This assumes each event is butted up against each other.