My last two:
43A One giving support to Seat in the States (4,3)
B _ T _ / _ _ A
44D Lots of cops Yard put on hobo's case. (5-2)
_ _ L _ Y - _ O
Am thinking this is probably TALLY HO (which fits the 'Yard put on hobo's case' part of the clue, though I don't get the rest). If so the first letter of the second word of 43A would be a T.
And suggestions would be appreciated.