While you cannot legally download the full Clan OT family for free for unrestricted use, there are where you can access it at no cost:
Great typography doesn’t have to be expensive. By choosing open-source alternatives, you stay legal, safe, and creative. clan ot font family free download
If your budget doesn't allow for a premium license, several high-quality free fonts share similar geometric and humanist traits with FF Clan: FF Clan - News Font | MyFonts While you cannot legally download the full Clan