The most common and most likely answer to this crossword clue is the 8 letter word REVERSED
I've seen this crossword clue in The Guardian
R
E
V
E
R
S
E
D
More clues leading to the result REVERSED
- Knowledgeable, with bible lessons being put back
- Embarrassed about lines being revoked
- Turned round and put back into poetry
- Backed into a corner, ever seductive
- To embrace poetry socialist went back
- Went back and booked, having five seconds to change places
- Engineers with skill went back
- Stop signal keeping lines backed up
- Ruby pens poetry reading from right to left
Buddy explains!

The straight part
We know that "Turned round/put back into poetry" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case turned round/put back into poetry = reversed.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 REVERSED mean?
REVERSED verb- To turn something around so that it faces the opposite direction or runs in the opposite sequence.
- To turn something inside out or upside down.
- To transpose the positions of two things.
- To change totally; to alter to the opposite.
- To return, come back.
- To turn away; to cause to depart.
- To cause to return; to recall.
- To revoke a law, or to change a decision into its opposite.
- To cause a mechanism or a vehicle to operate or move in the opposite direction to normal.
- To change the direction of a reaction such that the products become the reactants and vice-versa.
- To place a set of points in the reverse position
- (of points) to move from the normal position to the reverse position
- To overthrow; to subvert.
- Turned or changed to the contrary; inside out.
- Resupinate.