3: Correspond with mother and I boarding train (1-4)
6: Indian chief of devout faith (5)
9: Approaches first of nine pieces of corn (5)
11: Cot is unmade for short month in fall (3)
12: Neither's partner participated in an orchestra (3)
13: Sinatra improved, becoming a master of his craft (7)
14: The French inheritance given up by a former French colony (7)
16: Air transport for the lumberjack? (7)
18: Right, turn right to play with robot (3)
19: Frost to cover the cake (3)
20: Plots get Cuban revolutionary leader in a terrible mess (7)
21: Gold tooth, perhaps, in satellite? (7)
23: Betraying no emotion when Greek god has first expired (7)
27: Oxygen is pretty amusing. (3)
28: Discounting all odds, teen assured to succeed (5)
29: Predatory bird decapitated dog (5)
30: Strap, though short, has hanger's heart (5)