Can't sort a particle with sub-emitter

Hi, I tried to make a VFX in 2D scene with two sets of sprites - one a parent, and second a subemitter (something like a ‘smoke’). I found that I can’t move the subemitter behind its parent, it always occludes it.

I tried sorting by layers, order in the single layer, even position and pivot; tried switching between world/local. Can’t get it working. Can the sub-emitter be sorted?

Unity 5.6.2

Apparently internet does know the answer either, one would think everything was said in every matter.

If I’m messing with terminology, let me know. Maybe that’s why I can find any solutions on the net.