Answer:
Break it and it is better, immediately set and harder to break again.
I wear a red robe, with staff in hand, and a stone in my throat.
According to the music industry, you can count on a midnight train and the devil to turn up here.
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
What sphinxes employ and players enjoy.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?