Saturday 1FEB25, 49A

I don't understand how the answer connects to the clue of "Solo". I think I have a blind spot for it because in my dialect of British English a stag is a large group of rowdy men celebrating an upcoming wedding; a bachelor party which is of course the opposite of solo. And, in a more literal sense any time I've seen a red deer stag, it's been as part of a large group of females, usually during rutting season