I have _ULY, so DULY seems a possible answer, RULY a bit less so. But why?
I'm getting a little punchdrunk from too many crosswords (not to mention too many late nights!) and I'm just not seeing this at all. The whole puzzle has been a struggle, I haven't really latched on to the unclued letters at all... roll on Christmas and the chance for a good rest!
Thank you. I suspected an extra letter was involved. They're not that apparent, and from other threads it seems I'm not the only one who's struggling to find them.