Utter lies about drunk? Not I! (8)
I believe the answer is:
absolute
'not i' is the definition.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for absolute that I've seen before include "Complete, full" , "Complete, total, without limits" , "Rival" , "decided" , "Unqualified; Sheridan's Sir Anthony" .)