23A - French opera (7) I have O?U???S
25A - provenance of Hugh of Ipomedon (7) I have R?T?A??
3D - naval occasion said by Ovid to be a good place to meet girls (9) I have N?U?A?H?A
17D - 'the battle of the 28th was fair __ work' - Wellington (8) I have ?L???R??