The letter sorter should manage this all right (7)
I believe the answer is:
anagram
This clue might be a double definition.
'the letter' is the first definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'sorter should manage this all right' is the second definition.
The definition suggests a singular noun which matches the answer.
Can you help me to learn more?
(Other definitions for anagram that I've seen before include ""Diagnose" is one of "San Diego"" , "new order, literally" , "Word formed by changing the order of letters in another" , "Sort of letters" , ""Supersonic"of "percussion", for example?" .)