Back again, I fear as I'm stuck on 5 interconnected ones in the middle :
29A - Second company leaves firm, going after capital in Ireland (7)
I?S??????
34A - Crack stolen by potential killers (7)
????H??
24D - Young man holds bronze for scientific study (6)
B?????
26D - Man serving on board has to understand desired objective (6)
?????T
&
31D - Rogue wizard lacking power to go after queen (6)
R???E?