My answer might seem a bit too simple, but anyway: why not put both - your direct number for people who prefer to first 'get to know you' before scheduling a consult, and the Clarity widget for people who already know what they want, and just need some quick advice.
Just take into account that if you add the clarity widget, and you don't have any reviews yet (or have reviews but they're negative), then maybe it would be less wise to add the widget.
If you are new to clarity and want to get some reviews, you could use your VIP code to offer free calls - this way you get happy clients, and you build your reputation on clarity by getting more reviews.
I hope this helped.
Good luck