Crossword Genius

Make further changes to last sheet of paper, presumably (7)

Ross

I believe the answer is:

reamend

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'make' is the definition.
Both the answer and definition are verbs in their base form.
Perhaps there's a link between them I don't understand?

'further changes to last sheet of paper presumably' is the wordplay.
I cannot really understand how this works, but
'last' could be 'end' (I've seen this in another clue) and 'end' is present in the answer.
'paper' could be 'ream' (I've seen this before) and 'ream' is found within the answer.
No letters remain.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Telegraph.
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