Audio Side Chain

A side chain functionallity in Premiere would save me so much time. I understand that is a feature in audition, but when I'm just trying to use a compressor to duck music under a voice, sending the files into audition and back again is such a time suck.

I still use audition if I am doing any major audio work but being able to side chain in Premiere Pro would be fantastic for those quick functions. I'd also have the ability to tweak it as I go if I change my mind instead of baking it into the audio files and sending it back to Premiere from Audition.