An unmarked letter in Clive's room notifies him that Leviathan's Dominant is in trouble and that he'll need to travel to The Veil in Northreach to learn more. After finding their source ...

Letting Off Steam III quest in FF16 starts with Clive ... Followed by that, both Clive and Jill will visit the Northreach Market. After getting the supplies, Jill will ask Clive to have a walk ...