Related Clues:

• The knotty problem of the back row
• Small knot in wool
• Knot in wood that's coarse rejected
• Knot starts to get nervous and rapidly leaves
• Something lumpy regularly blocking gun barrel
• Rough lump (on a tree)
• Something sticking out of trunk giving rise to row
• Called backward pupil an "unsightly lump"
• Lump or knot in a tree
• Line up the knot
• Tree-swelling
• Knot on tree inside trunk narrowed
• Twist knotty protuberance on tree
• Knot turning up in Aran knitwear
• Twist into knots