11ac. Instrument that doesn’t even have keys, during limits of sessions, played always on black keys.(6) S?A???
16ac. When gas explosion tears heart out of city, you can see bright area above it in the night sky.(4)G???
12dn. It will multiply rapidly, like Covid 19, according to anti-abortion, anti-euthanasia judge.(11) ????I?????E
26ac? Bill is a judge sitting in a court in London.(4)B???