Messy abode

PIGSTY

Think of a farm animal known for its lack of cleanliness and the simple shelter it calls home.

Messy abode" plays on the literal and figurative meaning of "pigsty." A pigsty is a pen where pigs live, which is famously dirty, so it fits the idea of a messy place. The word also works as a lighthearted insult for any filthy room, making it a clever double meaning in crosswords.