Article in papers concerning for one potentially (1,4,3)
I believe the answer is:
i dare say
'potentially' is the definition.
(phrase used to say you think something is possible)
'article in papers concerning for one' is the wordplay.
'article' becomes 'a' (the indefinite article in English).
'in' means one lot of letters goes inside another.
'papers' becomes 'ID' (identification papers).
'concerning' becomes 're' (both can mean on a particular topic).
'for one' becomes 'say' (both can mean 'for example').
'id'+'re'='idre'
'a' placed into 'idre' is 'idare'.
'idare'+'say'='I DARE SAY'
(Other definitions for i dare say that I've seen before include "It's possible" , "Probably" , "One would think" , "It wouldn't surprise me" , "One assumes" .)