12d) this morsel would be shared if adult comes in (5) S?R??
19a) Web designer noticed her, by the sound of it (6) ?P???R
21d) Stop and surrender (4,2) G??? ?P - Give up?
24a) London museum looted primary by him? (6) ????A?
25d) Nobody's Numero Uno (4) ??N?
All help greatly appreciated.