Offered response when director quit (having undergone censorship) (7)
I believe the answer is:
'offered response' is the definition.
'director quit having undergone censorship' is the wordplay.
'director' becomes 'd'.
'quit' indicates named letters should be taken away.
'having undergone censorship' becomes 'redacted'.
'redacted' with 'd' taken away is 'REACTED'.
'when' acts as a link.
(Other definitions for reacted that I've seen before include "Responded to a stimulus", "Showed a response".)