Possible Clues:

• Animal with a very thick skin, elephant say
• Thick-skinned mammal
• Dreamy chap, not a bastard; he's thick-skinned
• Thick-skinned beast
• Thick-skinned animal
• Very large thick-skinned mammal
• Animal with very thick skin, elephant say
• Thick-skinned animal like elephant or rhino
• Large mammal in pain died in set
• Elephant, perhaps