Director involved in good change to film - do you see? (6)
I believe the answer is:
geddit
'do you see?' is the definition.
(I've seen this before)
'director involved in good change' is the wordplay.
'director' becomes 'd'.
'involved in' indicates putting letters inside.
'good' becomes 'g' (abbreviation).
'change' becomes 'edit' (editing is a kind of changing).
'g'+'edit'='gedit'
'd' placed into 'gedit' is 'GEDDIT'.
'to film' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Another definition for geddit that I've seen is " Do you see".)