The most common and most likely answer to this crossword clue is the 9 letter word NOISINESS
I've seen this crossword clue in Financial Times
N
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S
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More clues leading to the result NOISINESS
- Prying about the setter's conspicuous quality
- What Parker displays, disturbed by current din?
- Clamour for Tessa to get undressed, led by lust?
- Decibel reading of jam session featuring One Direction
- Curious behaviour around one — that’s not nice to hear
- One with overriding tendency to pry creating clamour
- Break down in session on getting the auditory effect characterized by too much sound
- Sen is so upset about Indian state of cacophony
- Character attracted to most significant of crimes, antisocial behaviour?
Buddy explains!
The straight part
We know that "Decibel reading" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case decibel reading = noisiness.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.