The most common and most likely answer to this crossword clue is the 5 letter word WROTE
W
R
O
T
E
More clues leading to the result WROTE
Buddy explains!

The straight part
We know that "put on paper" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case put on paper = wrote.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 WROTE mean?
WROTE verb- To form letters, words or symbols on a surface in order to communicate.
- To be the author of (a book, article, poem, etc.).
- To send written information to.
- To show (information, etc) in written form.
- To be an author.
- (with to) To record data mechanically or electronically.
- (of an exam, a document, etc.) To fill in, to complete using words.
- To impress durably; to imprint; to engrave.
- To make known by writing; to record; to prove by one's own written testimony; often used reflexively.
- To sell (an option or other derivative).