So had a play around with mesh volume clouds
And here it is….

Made a base shape from metaballs and then converted to mesh, a quick sculpt to better define the shape. Add a volume empty and added the only 2 modifiers available, first a Mesh to Volume Mod, select the base mesh as the object, I’ve used a density of 3 , and Ext Band Width of 0.05 which keeps it more to the base shape. The next mod is the Volume Displace, add a texture the same as with a standard Displace Mod, I used a cloud tex with default settings, the rest of the settings in the Volume Displace Mod are set at the default..
This is Ext Band Width set to 1 👇, as apposed to 0.05 👆

This with the Volume Displace strength down from default 1 👆👆, to 0.1👇

So you can see the effect of these settings.