Gussalufz, after drinking a bit of scotch, somehow felt alone (6)
I believe the answer is:
itself
But I can't explain it at all! Could you help me understand?
(Other definitions for itself that I've seen before include "alone by this" , "The thing in question" , "Pronoun used to reflect the object or for emphasis" , "that's the thing" , "The thing, I stress" .)