Maybe the clinician didn't know the answer, either, and was stalling for time to think. 🙂
Wow. They used to do it to us all the time. I mean, not in a mean way, but our clinicians - especially on ER or surgery, it felt like - would go with us, but would have us drive the interaction with the client quite frequently. I feel like that's important for advancing a student's skills.
And, as your fourth year progresses, things change. By the time you hit your last rotation, many clinicians won't even bother going with you to talk to the client. It's a progressive thing as you gain knowledge and comfort, and I presume that clinicians gauge it off of how much you seem to understand the case when you talk to them about it. At least, that was my experience.