Broken Clockwork
It is in the dungeon its self.
At the end of the dungeon, after you have killed the Clockheart boss, starts a 10 min time limited window where you can do all the addition stuff. If you just simply stick with Caithe (She will stand still and talk for a bit before moving) she will lead you to Scarlett’s secret room. There you will need to interact with a “Suggestion Box” which then spawns the clockwork thing for you to kill.
Do you have to complete this by tomorrow for credit or can it be done any time within the dungeon?