By far (6)

I think it could be either:

Which length description are you looking for?:

3,3,4

easily

'by far' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for easily that I've seen before include "without a hitch?" , "Very probably" , "without doubt" , "Comfortably" , "Without much difficulty" .)

I've seen this clue in the Evening Standard and The Mirror.

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.