Is there a way I can clear chapters immediately?

In the game's adventure mode, you'll be able to complete repeat chapters by playing them normally, or through sweeping. In order to sweep a dungeon, you'll need a Sweep Ticket which is obtained through adventure rewards, daily quests, and achievements.

When checking the Repeat Chapter information, you'll see a Sweep button beside the battle button. If you press on this, you can check how many times you can sweep the dungeon as long as you have enough tickets and AP.

Once you have chosen your option, you'll instantly get your rewards and you won't have to go through the dungeon run. This is useful if you're trying to speed up on Leveling your Account, and if you have excess sweep tickets. Take note that you can only Sweep instances you've completed before.