Originally Posted by byrtenator
Try looking around the room with the rotating staircase. Do you notice any clawshot places you can shoot up to? Try looking at clawshot spots you haven't tried before. If you still haven't figured it out, here is the solution:
Spoiler Alert!I am assuming you have beaten the mini boss in this level and gotten the clawshot tool. When you head back into the rotating staircase room, look for a clawshot tile that doesn't have a pully on it. You have to use the steel boots in order to be heavy enough to move the staircase to let in the last bit of water in order to get to the boss.
I hope this helps