Crossword Genius

Film where English must cover up Channel Islands evacuation procedure? (5)

Ross

I believe the answer is:

enema

I'm a little stuck... Click here to teach me more about this clue!

'procedure?' is the definition.
(I have seen 'medical procedure' mean 'enema' so perhaps 'procedure' could also mean 'enema')

'film where english must cover up channel islands evacuation' is the wordplay.
I cannot quite see how this works, but
'film' could be 'm' (1931 Fritz Lang film) and 'm' is present in the answer.
'english' could be 'e' (abbreviation as in OED) and 'e' is found in the answer.
The remaining letters 'nea' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for enema that I've seen before include "In the end medical procedure" , "Rectal medicine" , "Medication introduced from behind" , "process to ensure evacuation" , "Stern action from nurse perhaps" .)

I've seen this clue in The Independent.
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