The most common and most likely answer to this crossword clue is the 9 letter word AUDIOBOOK
I've seen this crossword clue in The Guardian
A
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More clues leading to the result AUDIOBOOK
Buddy explains!

The straight part
We know that "work we hear" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case work we hear = audiobook.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 AUDIOBOOK mean?
AUDIOBOOK noun- A recording, usually made available for sale, of a reading of the full text or of an abridgement of a book.