Yes, it is perfectly acceptable to ask for clarification if you didn’t hear or understand a question properly during the IELTS speaking test. Here are some guidelines on how to do it:
Part 1 and Part 3: You can politely ask the examiner to repeat the question if you did not understand it or missed a word. For example, you can say:
“Sorry, I didn’t get the question. Could you say it again please?”
“Sorry, can you repeat the question please?”
“Sorry, would you mind repeating the question?”
"Sorry, what was the last word?"1
Part 3: If you need a question to be rephrased because you don’t understand it, you can ask:
“Sorry, could you explain that question in another way?”
"Sorry, I didn’t get the question. Could you say it in a different way?"1
However, if after asking for clarification you still do not understand the question, it’s better to try and talk about something related to the question rather than asking for clarification again. It’s important to keep the conversation going and demonstrate your language skills.
Remember, it’s better to ask for clarification than to answer incorrectly or not at all. Good luck with your IELTS speaking test!