One month of the year (8)
(Other definitions for october that I've seen before include "Cot robe for this month" , "Pre-Caesarean calendar's eighth month" , "Strong ale" , "some weeks" , "gets a designation of 10" .)
(Other definitions for november that I've seen before include "Mob nerve is bad this winter month" , "Thirty days hath September, April, June and . . . . . . . ." , "Never mob (anag.)" , "Mob nerve (anag)" , "'N' in the phonetic alphabet" .)