Crossword Puzzle Early shipbuilder

Clue: Early shipbuilder

Busy group in early Apr. (CPAS with 4 letters)
"It's not too early to call" (IMUP with 4 letters)
Early sneaker brand (KEDS with 4 letters)
It starts in early Apr. (DST with 3 letters)
Early Berlin song (ARABY with 5 letters)
Early adding devices (ABACI with 5 letters)
Early blues singer who starred in ''Cabin in the Sky'' (ETHELWATERS with 11 letters)
ABC early show (GMA with 3 letters)
Early match, briefly (PRELIM with 6 letters)
Early Disney distributor (RKO with 3 letters)