The most common and most likely answer to this crossword clue is the 10 letter word PLENTITUDE
I've seen this crossword clue in Independent
P
L
E
N
T
I
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U
D
E
More clues leading to the result PLENTITUDE
Buddy explains!
The straight part
We know that "of line occupying writer – duet rewritten with it (10)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case of line occupying writer – duet rewritten with it (10) = plentitude.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 PLENTITUDE mean?
PLENTITUDE noun- Abundance, fullness, completeness; an instance of this.