Trying to fix audio issue

Hello. For my podcast we had to record a few people remotely and one person had something off in his audio recording setup. Recording to his laptop using some form of a headset. His audio has a fluttery pop sound to it thru out. Trying to fix in Audition but having a hard time knowing what to use. Below is a link to a
sample of the audio.!Am-bGumYDvdrgcANqC68e6ycGMppcg. Luckily he is a secondary guest and the primary guest is record to a separate track with great audio. Thanks for any help!