Lovatts Colossus 123 Cryptic

Hello,
I'm stuck on the last 4....
46a - Regular choir item in Anglican Service - I think it's EVENSONG but I'm not sure - the letters are E?E?S?N?
47a - You and I head east with little result - I don't have any letters for this one - ???
17d - Risks to take on board - I have S?A?E?
and last one:
29d - Amount of money paid for Ms Osmond's briefs - I have ?U??A????
Any help would be greatly appreciated.
Cheers
Sophc