Can't finish this!
1a Specialist advisors? Idiots, time-wasting types (9) A?S?????S
3d Trail round in game, not finishing (5) ??O??
4d Piano music was once stored here in form (2,1,4) ?? A ???L
15a Suffer, working for nothing --- there's little good in that (7) U?D????
38a Foreign letter or article written by volunteers (5) I?E?A ["I" could be wrong I have Erasion for 29d]
45d Had lots of drinks in store knocked over (5) T?P?D
Ta!