9 Across, Maker's command when only front of Fiat is showing instability(4)
SORRY NO LETTERS
16 Across, Obligation to evict The Simpsons commonest character from Springfield?(4) D???
15 Down, East Asian country embraces excellent herbal remedy(9)E??????A
21 Down, Ultimately,radiation sickness is inescapable retribution(7)N?????S