Crossword Genius

Dismissal for adding copy into middle of notes she typed (3,4)

Ross

I believe the answer is:

the chop

'dismissal' is the definition.
(getting 'the chop' is getting dismissed)

'adding copy into middle of notes she typed' is the wordplay.
I cannot really understand how this works, but
'copy' could be 'echo' (echo can mean a copy or duplication) and 'echo' is found within the answer.
This explanation may well be incorrect...

'for' acts as a link.

I've seen this clue in The Guardian.
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