Possible Clues:

• Wilfully doing wrong according to a number of lines
• 19 down through the medium of poetry, it seems
• A rhyme is troublesome
• Cussed
• Through poetry, becoming irrational
• Preserve in order to be stubbornly intractable
• 'Contrary to what's considered right, proper or good (8)'
• Deliberately wicked by-lines
• Each part of chapter is intractable
• Contrary, through poetry