It's ok to ask an interviewer to repeat a question or to clarify the focus of a question. It’s really important that you answer the question you are being asked, so asking for the question to be repeated or clarified is absolutely ok and interviewers won’t mind doing this. They want to learn about the details of your previous work experience and assess whether your experience, knowledge and skills are a match for the role’s requirements. Focus on the detail of your answers and getting your experience and skills across to them. The interviewers are willing you on, they want you to do your best.
My interview tips are based on my years of interviewing experience and my years of interview coaching. I hold qualifications in HR and Business Psychology.