7a Scalpel? (9,4) Operating/???? (I could be wrong with operating but it fits the letters I have)
12a Sudden entrance caused by his getting run out (6) I???S?
22a Hospital numbers (13) ?N?E?T?E?I?T?
5d Plant around winter (6) ???N?? (2nd letter is first in second word of 7a)
6d Bird about to have an argument ???W (2nd letter is third in second word of 7a)