The most common and most likely answer to this crossword clue is the 5 letter word VERSE
I've seen this crossword clue in The Times
V
E
R
S
E
More clues leading to the result VERSE
- Poetry volume: the Queen’s English
- Poetry volume seer translated
- Vicar taken aback by extremely strange poem
- Lines some observer sees
- Gaelic volume's introducing poetry
- Volume with Irish poetry
- See Gaelic language poetry
- Some of Hasenclever’s expressionist poetry
- Vicar upset by extremely seductive poetry
- Five Gaelic lines of poetry
Buddy explains!

The straight part
We know that "Lines" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lines = verse.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 VERSE mean?
VERSE noun- A poetic form with regular meter and a fixed rhyme scheme.
- Poetic form in general.
- One of several similar units of a song, consisting of several lines, generally rhymed.
- A small section of the Jewish or Christian Bible.
- A portion of an anthem to be performed by a single voice to each part.
- To compose verses.
- To tell in verse, or poetry.
- To educate about, to teach about.
- To oppose, to compete against, especially in a video game.