The most common and most likely answer to this crossword clue is the 6 letter word PIGPEN
I've seen this crossword clue in The Sunday Telegraph
P
I
G
P
E
N
More clues leading to the result PIGPEN
Buddy explains!

The straight part
We know that "that accommodates swine" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that accommodates swine = pigpen.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does PIGPEN mean?
PIGPEN noun- A pigsty; an enclosure where pigs are kept.
- Something extremely dirty or messy.
- The pigpen cipher