The most common and most likely answer to this crossword clue is the 9 letter word PIECEWORK
I've seen this crossword clue in Independent
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More clues leading to the result PIECEWORK
Buddy explains!
The straight part
We know that "for which payment is determined by amount produced" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case for which payment is determined by amount produced = piecework.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 PIECEWORK mean?
PIECEWORK noun- Work that a worker is paid for according to the number of units produced, rather than the number of hours worked; work done and paid for by the piece or by the job.