This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 廜 is uncertain. It visually contains 广 (building enclosure) and 屠, but the component relationship is unclear.
The kanji has a building enclosure 广 around 屠, which suggests slaughter. Without a clear meaning, it might be remembered as a mysterious building where something uncertain happens.
For ト, imagine a toe (ト) stepping into the mysterious building enclosure 广, unsure of what lies inside.