Waiting for proof purely for one editor (7)
I believe the answer is:
alleged
'waiting for proof' is the definition.
I can't tell whether this definition defines the answer.
'purely for one editor' is the wordplay.
'purely' becomes 'all' (I've seen this in another clue).
'for one' becomes 'eg' (both can mean 'for example').
'editor' becomes 'ed' (abbreviation).
'all'+'eg'+'ed'='ALLEGED'
Can you help me to learn more?
(Other definitions for alleged that I've seen before include "Dubious" , "Declared without proof" , "Asserted but not proven" , "Deal leg (anag.)" , "Stated without proof" .)