Crossword Genius

By oneself (5)

Ross

I believe the answer is:

alone

'by oneself' is the definition.
(being by oneself is being alone)

This is the entire clue.

(Other definitions for alone that I've seen before include "With no one to see" , "without another" , "Without anybody or anything else" , "Singly" , "On one's own" .)

I've seen this clue in The Mirror, the Penny Press and the Sydney Morning Herald.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.