A family of Microsoft word processing software products for creating web, email, and print documents.
Just a suggestion, try signing out and back in to your Microsoft Office account. I was having the same incessant clicking sound issue and after I signed out and back in, the clicking went away. It had to deal with the fact that my user wasn't properly signed in and I had an exclamation mark next to my name in the top right area of MS Word/Excel/etc. After I signed in again, the exclamation mark went away, and so did the clicking.