I'm not sure if this is the right board, but I'm hoping to send a bat signal to someone who can help with a very specific grammar query.
When I was at university a hundred years ago, I was on a committee. The committee positions were representatives: Actors' Rep, Directors' Rep etc.
I remember one meeting where the actors' rep, who was an English student, was arguing that we could put the apostrophe before the s: Actor's Rep.
I think he had a specific term for the singular possessive construction in this context, where the "actor" is a single actor, yet the "actor's rep" title implies plural actors are being represented.
Is this a thing, or have I completely misremembered?
I don't know if this makes any sense. Google is not helpful.