Hey! I came in for an interview at a separate university the other day and was asked a number of research/ethical/clinical questions. I think you can expect questions like "what interpersonal/ethical challenges have you experienced when dealing with clients and how did you resolve that?" "from a clinical perspective, what do you think is your strongest point?" "if you bump into a client at party, should you say hi to him/her? what possible consequences do you think might arise from this situation?"
for a lot of these "clinical" questions, it's hard to get a straight wrong answer. A lot of them are justifiable through reasoning, you just have to show that you are capable of thinking ahead and considering the potential consequences that come out of your responses. the professor interviewing me also said that he uses these questions to see how well i respond to feedback- while i was answering them, he was throwing me a lot of other "but what if this happens" statements. I suppose he was just checking to see if i was able to incorporate his input and change my answer accordingly. I was also asked what my theoretical orientation was in terms of interventions (e.g., CBT, human-centred, etc.)
Alternatively, while preparing for that interview, i came across this pdf <http://www2.tulane.edu/sse/psyc/news-and-events/archive/upload/InterviewQuestions.pdf>. I found it really helpful and I hope you do too. Even if a lot of the questions listed aren't asked, I think you'll find that, while trying to answer these questions, a lot of the responses you have are adaptable to the questions you're going to be asked during the interview day.
Hope that helps! Good luck!!