Find X Atom of given Window?

Using [_DWM_](https://git.suckless.org/dwm/log.html) as my Window-Manager under _Archlinux_ I don't have any patches to handle context menus or "right-click" functionalities. This being the case I decided to write a concise _Bash_ alias that runs xclip (which I can later re-map to mouse buttons using _libinput_ and such). My issue now though is that I am trying to re-direct my xclip selections to a specific window but I'm not finding how I can grab the _X_ _Atom_ with any commands so far. I've tried xprop and xwininfo but none of the data returned matches the _Atom_. Any help or insight is appreciated.