The most common and most likely answer to this crossword clue is the 9 letter word LODGEMENT
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More clues leading to the result LODGEMENT
Buddy explains!

The straight part
We know that "accommodation" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case accommodation = lodgement.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 LODGEMENT mean?
LODGEMENT noun- An area used for lodging; a place in which a person or thing is or can be lodged.
- The condition of being lodged.
- The act of lodging or depositing.
- The occupation of a position by a besieging party, and the works thrown up to maintain it.