Crossword Puzzle Key creation

Clue: Key creation

Keyboard creation of the 1960s (MGSYNTHESIZER with 13 letters)
Horn with keys (SAX with 3 letters)
Shavian creations (PLAYS with 5 letters)
Villain's creation (PLOT with 4 letters)
Keystone fellow (KOP with 3 letters)
Chicago keyboardist Robert who wrote many of the band's early hits (LAMM with 4 letters)
The six days of the Creation (HEXAEMERON with 10 letters)
Keyboard wood (EBONY with 5 letters)
Expressive creation (ART with 3 letters)
J.M. Keynes subj. (ECON with 4 letters)