### Clue: 22's very sharp, very sharp ultimately in test (6)
### Answer: VORPAL 
 ### Explanation: Definition: 22's very sharp
 V(abbrev. for "very") + [**last letter of**(… ultimately) "sharp" **contained in**(in) ORAL(a test with spoken questions and answers)].
Defn: Word coined by 22 to mean "very sharp", describing the sword used to kill the Jabberwock in his work, "Jabberwocky".