Yep, that’s what I was thinking, but I guess I need to first figure out what page class (? I’m guessing that’s the term I want?) the directory pages are so as to do so.
Oh no, actually …. I just went back to look at the directory entry page, and now recall I had checked a selection in the admin user settings that get added by the plugin itself (“Do not show Author Box in your posts, pages and custom posts”). That has fixed the problem. Yay!
(I’ve been going around and around with a couple of things this morning on this site, and obviously am being a bit dizzy at the moment. I sorta get the technical stuff, but it’s just enough sometimes to get myself in trouble. :) )