Following Leliana's suggestion of sending assassins after Duke Antoine will get your clan killed in retaliation. She warns against direct action and is not wrong. Leliana's agent, Jester, updates the Inquisition on Duke Antoine's plan to kill the Dalish. Investigate Duke Antoine of Wycome (60 min) Completed Protect Clan Lavellan with Leliana. This choice puts on you on one of two paths – Investigate Duke Antoine of Wycome with Leliana or Break Venatori Hold on Wycome with Cullen.
Josephine's attempt to solve matters with diplomacy will backfire and get your clan killed, so choose either Cullen or Leliana to help protect your clan. The Dalish contact the Inquisition, worried about bandits who have been harassing the clan. Protect Clan Lavellan (15 min) Contact Clan Lavellan completed successfully, player has been made Inquisitor. Have Leliana or Josephine contact them, as Cullen's soldiers will scare the clan and start an incident that costs lives on both sides.
They're concerned you might be a prisoner. Your Dalish clan contacts the Inquisition. Contact Clan Lavellan (15 min) Be an Elf Inquisitor