You can experiment with reducing the gain 3-6dB and see if that takes care of it. But if the distortion is in the actual audio you can’t get rid of it… unless it’s very minor distortion in which case you can bring it into ProTools and draw out the peaks by hand. I think there’s even a plugin that can do that for you… again, only if it’s minor distortion.
Another thing you can do is put an EQ on that track. Select Mid3, narrow the Q and crank the gain so you are only listening to a very loud, but narrow band of a frequency. Then sweep through the frequencies to try and find the nastiest sounding distortion. Once you have located it bring down the gain of that frequency until it’s tolerable.