The most common and most likely answer to this crossword clue is the 10 letter word AUDITORIUM
I've seen this crossword clue in The Guardian
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More clues leading to the result AUDITORIUM
- Listener writer’s defending superior concert hall
- I admit our university needs new assembly hall
- House room
- . Man of accounts with single hesitation in hall
- He checks out leaders of ill-repute using mayor’s public hall
- No end in turmoil brewing by car showroom?
- Theatre review — nothing unusual about this writer
Buddy explains!

The straight part
We know that "concert hall" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case concert hall = auditorium.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 AUDITORIUM mean?
AUDITORIUM noun- A large room for public meetings or performances.
- (in a theater, etc.) The space where the audience is located.