Sorry, I didn't understand the problem.
If it's sampled, why don't you start the sample at ~2% (or less) into the file, after the click? I know that's possible in NN-XT, not too sure about Korg (again, Reason 3.0, no Korg - sadness). Alternatively, you could fix the click manually via Audacity and re-upload the sound. If it's a problem with the sample itself (which is what you're saying, by the sound of it) you'd be hard pressed to fix it in the compressor, especially if it's in the beginning, like you said. Even if you could, it's much easier just to fix the sample itself.
Once the sampled click is gone you can add the correct amount of click artificially via compressor, limitors, etc. That's how I'd approach it, anyway.