Help appreciated parsing these....
2d. How broadcaster might begin birthday congratulations (5) - BRAVO? (Congratulations)
3d. Musical piece composed over two acts? (7) - TOCCATA (Musical piece)
46d. Puzzled when donkey eats most of leftover pack (2,1,4) - AT A LOSS (Puzzled)
I can see ASS but that leaves TALO
51d. Fabric that's not satisfactory in a mountain wind (5) - CHINO? (Fabric)