Possible Clues:

• In sea shanty's beginning can get a six-line stanza
• Troubador's verse form
• Verse briefly estimated in a sin, perhaps
• Form of poem
• Intricate verse form rewriting isn't easy, but not unknown
• No end of fuss, in the main, creating poetic structure
• Poem with six stanzas
• Highly structured poem of 39 lines
• Old verse form
• Troubadour's poem