I restate how this paper could have been edited (8)
I believe the answer is:
treatise
'i restate how this paper could have been edited' is the definition.
'treatise' can be an answer for 'paper' (I've seen this before). I am not certain of the remainder of the definition.
'restate how this paper could have been edited' is the wordplay.
I cannot quite understand how this works, but
'paper' could be 'i' (UK newspaper) and 'i' is found in the answer.
an anagram of 'restate' is 'treatse' which is within the remaining letters.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for treatise that I've seen before include "Learned writing" , "Essay on theme" , "Learned work on particular subject" , "A written work about treaties" , "Written work dealing with one subject" .)