When my shirt is tucked, it's in my front pocket. Not my favorite because it's just about impossible to get to when I'm sitting down - like when I'm driving.
I'm going to try Krdshrk's suggestion for the Alien Gear Cloak. https://aliengearholsters.com/belt-holster.html.html
Seems like it's almost the holster I was imagining.
Are some brands of pants better than others for this type of carry? Like, do certain brands of pants, or specialized "tactical" pants have deeper pockets with larger openings, etc. It seems like a lot of pants these days have tiny pockets.