Related Clues:

• Long dull passage covered in loose rock, apparently
• Filibusterer’s delivery, often
• Long (boring) piece of writing
• Long boring speech illustrating singular belief ...
• Lengthy Twitter post, often
• Long piece of (tedious) writing
• Diatribe from barman taking grass
• Sikh’s opening statement of belief? It’s a long document
• Second religious summary, a lengthy read
• Lengthy discourse