Your question is Structuring Ambiguous Case Problems. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you were given a business problem with ambiguous or incomplete requirements and had to structure the work yourself. How did you decide what questions to ask, what to prioritize first, and how to communicate your approach as the problem became clearer?