Whenever Link enters the Clock Shop, he finds Tick Tock working on some sort of project, either making or fixing clocks. Despite all of this however, Link can never purchase any of Tick Tock's merchandise. The Clock Shop does, however, serve a purpose in the trading quest for the Noble Sword; Link can trade Tick Tock the Wooden Bird in exchange for some Engine Grease.
Directly below the Clock Shop is a large cavern. It can be accessed by digging to the northeast corner of the building. If Link receives a password from the Old Hag in a Linked Game of The Legend of Zelda: Oracle of Ages, there will be an Old Man below who will accept the Clock Shop secret. He will then make numerous enemies appear. If Link defeats them all within sixty seconds, the Old Man will upgrade Link's sword to either the Noble Sword if Link has not completed the quest for the Noble Sword, or the Master Sword if he has.