Any question will work for to start with a research.
How does a garment holds on to a body? And what would be the new possible ways to attach it?
In most cultures it gets supported by hips or shoulders in order to not to fall. And so we all construct clothes in that way. However different clothes trigger different behaviors, and different behaviors make us unique. In this spirit I look for other options to attach a garment to a body. What if it would depend only on head or hair or ears or hands or chin?
Usually clothes are made just for one body pose. The standing pose. How would a garment look like if it was designed for any other pose different than standing?
Best coat to travel with?
Perhaps the one you can sleep in.
Would a puzzle serve as useful button?
How to store clothes in the most efficient way?
Perhaps use them as a carpet.
How to photograph your works if your studio is too small?
Two garments in one?