Stuck on these clues any help would be appreciated. Thank you.
11 across- Painful painting geting bad? Bring in oxygen(8)?????AN?
29 across- Square brown vessel that used to sit on desk(8)S?A??I?
31 across- Duke has domain across river-area ruled by tyrant (9)??S??TA?E
1 down- Commander with wounds sitting up in coat(6) S?????
9 down- Source of power halved with the introduction of your old- fashioned gas(6)???Y?E
12 down- Mineral that is right for putting into explosive (10)????I??I??