Thanks for the advice, everyone!!
I suspected replacing the hose is what's required.
Even if the hose clamp idea was feasible in general, the leak is too close to the floor seal to really be able to put a clamp there.
I will probably need to get someone to do this repair. I wouldn't know the first thing about removing that seal, nor how to re-seal the floor afterwards! (unless there's some trick and it's easier than it looks to me!)
Thanks again! I can always count on this group for good advice!!