Thanks for playing!
After defeating Sir Rabbit, you need to double jump to the left side of the room before the boss fight and get on top. Then it is an easy way out back to the previous room! Hope you find your way back to the Clock Tower, I think you will enjoy that level!
Ah, the sequence will still work even if you dash past without activating the levers, but you might not be able to double jump back to get to the Clock Tower. I may have to fix this.