Shock treatment by journalist after film is chosen again (9)

'chosen again' is the definition.
('elected' is an answer for 'chosen' so perhaps 'reelected' is OK for 'chosen again')

'shock treatment by journalist after film' is the wordplay.
I cannot really see how this works, but
'treatment' could be 'ect' (ECT is an example) and 'ect' is found in the answer.
'journalist' could be 'ed' (short for editor) and 'ed' is located in the answer.
'film' could be 'reel' (reel is a kind of film) and 'reel' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).

'is' is the link.

Can you help me to learn more?