Remove phrase or waveform

Relating to Adobe Audition, if you have a piece of audio that has a voice talking, is there a way to remove a specific phrase? Or even a shape of a waveform? In a piece of audio, I would like to remove a distinct phase. I would also like to add a marker there if possible. I have been doing this manually. I simply can notice the waveform. However, I wondered if there is an easier way? Any suggestions are welcome. Thanks