Holiday Collection No. 84, Cryptic

Stuck on a few,
No.7 Across, Mouse wrapped up chat about walrus, perhaps,??u???c??
14 Across, Tradesman initially managed to fix ports vehicle, ??a???o??
17 Across, Hires a lumberjack to carry back light beam, ??s??
42 Across,Accepts modifications to the French extravaganza, s?e???c?e
43 Across, Drive taxi carrying Bolt, r????
37 Down , Quite a few were cut off by trainee,s???r?l
11 Down, Go in with main characters intent on fun, ??????a??e??
Thank you for any help.