This is largely an arrangement question vs a composition question as you already have the material recorded. You need to put on your arranger hat. Besides the cross fade solution I suggest you 'sandbox' the following techniques and then decide which ones work best with each clip and then proceed to the mixing stage.
Assuming your audio editor will allow you to stack tracks (multiple clips at once), here are some techniques to sandbox.
Vertical editing, stacking clips in a musical way.
For instance, choosing material that has continuous long sounds in counterpoint to clips that are highly punctuated, analogous to percussion over bowed strings.
Try numerous clips on top of each other, apply various filters to each to make a compound. Such filters may include a resonant filter, high pass, or low pass, or band pass such as found in a graphic equalizer. Keep an eye on the levels as you stack so the total mix does not go into clipping. Do not be afraid to place these in different areas of the stereo field using the pan feature.
Tight horizontal editing: try to make new sounds by taking several clips, cutting these at their peak amplitude and join to the next clip with its peak. You might take 10 clips and string them together to create an 'event' that lasts only 1 to 3 seconds. You might like to make several of these.
Check out this example by Karlheinz Stockhausen: "Telemusik" (1966)
...and Stockhausen KONTAKTE, 1 of 4
Vertical and horizontal editing can allow you to create all sorts of forms including a fugue.
Consider processes such as reverb, delay, tap delays, and reverse image as well as tremolo, vibrato, chorus, phasers, wha wha effects that most editors have built in.
If you only transition from one clip to another with a cross fade, you will certainly be missing out on a lot of musical potential. Consider the power of cutting at the precise moment to something else suddenly even if that does not sound smooth on paper it may offer you a new think-out-of-the-box solution.