...to make these lines! (5)
I believe the answer is:
verse
'these lines' is the definition.
(lines of poetry)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for verse that I've seen before include "Part of a song or poem" , "Metrical text" , "Piece of poetry" , "few lines of writing?" , "Section of a poem" .)