How do you keep a meeting with more than a few departments on track?

Every meeting I’ve been part of where that requires someone from at least 3 different departments quickly devolves into madness. Questions that go off track or get ahead of the topics to cover, talks about “needs to discuss whose court this will fall into” and other things and feels like after 30 minutes all that was agreed is that “we need to discuss this further”.

How do you keep things on track, do you hold questions until a certain point? Other tips you can share?

It’s not really talking to a room here just 5 people where 3 of them are different departments feels enough to turn a meeting into 5 useful minutes and the rest is just noise.