Solvers! I think this one's moderately tricky, so thanks for trying it, and do let me know how you got on. Here's the wash-up for any you didn't catch:
ACROSS 1A. Traitor = RAT, after "decks" initiated = D. 5A. Reversal of: finest = TOP + hack (journalist) = ED. 7A. Double def. 8A. anag. CRIED 9A. reversal of study = DEN, over first of "revisions" = R. DOWN 2D. Go wrong again = RE-SIN. 3D. Drag = TOW + Queen Liz = ER. 4D. Double def. (Porridge and stir are both UK slang for prisons.) 5D. Double def. 6D. father = PA + daughter = D.