Network stop second director working (7)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

I think I’m OK with network being the equivalent of a radio or TV station, and in the clue  with it being a pseudo plural that allows stop rather than stops. Not for the first time in my blogging career, the director is Jaques TATI. Before him S(econd) and after ON for working. [Early comments suggest the definition should include stop. Makes sense!]