Last two, help please.
3 Down (7,7) Provider of security to search gangly aliens besieging castle.
12 Across (7) Old fool embracing that woman - it'll all turn to ashes.
3d Conventions 9 E?I?U???E 20a A charming sort of accent 5 ?C??? Also Quick 8a single 5 : 3d eccentric character 7: 13d unexpected danger 7 : 10a meat dish 9 - not having a good day!!