Related Clues:

• Invertebrate chicken?
• Yellow invertebrate?
• Chicken partially boned?
• Weak, without purpose
• Yellow, like tattered old book
• 5 like crabs, worms and insects, say?
• Invertebrate; weak
• Lacking strength of character, unlike the porcupine
• Weak, purposeless
• Weak bowling technique Cook sees, getting over 50