Related Clues:

• Lean and muscular
• Well-sinewed
• Like thick vines
• Like stringy threads
• Thickly fibrous
• Hard to chew, maybe
• Cordlike
• Sinewy
• Like thick cords
• Like thick twine
• Like viscid threads
• Glutinous
• Forming strands
• Installing phone in a beastly place can be tough!
• Old bean is so mean - that's about right