I have made a lot of clocks over the years of all sizes and shapes but, this is the biggest one that I've made. It requires more wood working than a scroll saw and may not be your cup of tea but it might give you an idea or two.
It is called the "Country Curio Clock" and comes from plans I found on line. Actually, I've mad 6 or 7 of them for gifts.
I cut the face from birch plywood instead of using the plans. And there is some scrolling on the frame. I'll try to remember where I found the plans if you are interested.
Rog