Twixster (or other x-word x-pert): ATOB?

Today’s LA Times crossword.
36 across clue – “Hardly the full gamut”.
Answer: ATOB
What the heck is ATOB? :confused:

I think it’s “A to B,” as opposed to “A to Z”.

Oh. Thanks.
[sub]Yes, I’m an idiot. Move along, nothing to see here.[/sub] :stuck_out_tongue:

FWIW, if a constructor had tried that on me, I’d have responded with “nice try, but you can’t use that as a entry.”