Do the still and the clip of the dish absolutely need a tripod and a mirrorless body?

No, the clip can be handheld if the gesture reads, and the still wants support so the cut does not move. Demanding a specific body does not make the still and the clip the same dish. Try the clip by hand and the still on support, and compare the cut. In the sierra a body is bought and the clip and the still are still two dishes. What is looked at is that the cut matches, not which camera made it.