19d) SA swimmer managed to break a joint when surfacing (7) P???N?A
21d) It'll burst in short journey to summit (7) H?L???P
23d) Rouse 100 to leave without euros (6)
24a) Koala food provider, up which there's a problem (3,4) G?M? ??E
28a) Withdraw touching leaflet (7) R???A??
Thanks in advance for your help.