The latest beta build has two new filters that can be applied to a track to automatically reduce the pop/click.
Here is the beta thread on the forum:
Here is announcement:
From the notes:
Added Track Auto Fade and Track Seam audio filters. These filters address an old problem where clicks and pops may be heard in export when switching between clips due to discontinuities in the audio stream. A recommended technique was to add a 2 frame Fade Audio Out and Fade Audio in filters on clips. Track Auto Fade automates that. Track Seam works on a similar level but rather attempts to do a smoothing between outgoing and incoming samples around edit points. Both of these new filters may ONLY be added to individual tracks—audio or video.
Would you be willing to test these new filters to see if they work for you?