Applying effects to a single clip in a multi-track project

I have a multi-track project in which I want to apply an effect to one clip - not the entire track that it's on.

I tried to find a way to apply the effect to the entire track and then immediately keyframe the mix of the effect to 0% as soon as the clip it pertains to is over. But apparently, that's not something you can keyframe.

Then I tried clicking on the single clip to open it up in the Waveform Editor. I applied the effect to it in the Waveform Editor, and then hit "render to action" - Soundtrack crashes everytime I do this.

1. Is there a way to apply an effect to one clip instead of he antire track?

2. Why might Soundtrack crash in this situation?

Josh Veazey, Partnership for Affordable, Clean Energy

"Cinema is the most beautiful fraud in the world."
Jean-Luc Godard

[Josh Veazey] "1. Is there a way to apply an effect to one clip instead of he antire track"

Further to Paul's suggestion, if you're referring to effects like reverbs or echoes, a recommended way of working is to create a new bus, send the original track to it, then apply the desired effect to the bus. You can then control the level of the effect (from 0% to 100%) by automating the fader on the bus.

Depending on how you want the final mix to sound, though, you may find it necessary to split your clips up between separate tracks. For example, if you want one clip to have a reverb effect and be followed by clip with no reverb (but with the reverb from the first clip carrying on underneath), you will have to have them on separate tracks.