### Clue: Creature stunning a poet holding a book (5,4)
### Answer: KOALA BEAR 
 ### Explanation: Definition: Creature
 KO(abbrev. for "knock-out";stunning one into an unconscious state, eg. in the boxing ring) + A + LEAR(Edward, English poet, whose works included Nonsense Verse) **containing**(holding) [A + B(abbrev. for "book") ].