Was suffering brain freeze yesterday, and it is still with me.
12 across Opening is unproductive sounding (4) ?O?E
16 across Transport map is missing hosptial (4) ?A?T
24 across American at foot of hill getting donut (5) T?R?S
I'm very impressed folks, that was quick! I got torus literally seconds after posting, but I would still be here next week if I'd been left with the other two, especially "pore". Many thanks.