Make a mistake at a lot of mistaken words (6)
I believe the answer is:
errata
'lot of mistaken words' is the definition.
The definition and answer can be both related to communication as well as being plural nouns.
Perhaps they are linked in a way I don't understand?
'make a mistake at a' is the wordplay.
'make a mistake' becomes 'err' (to err is to make an error).
'err'+'at'+'a'='ERRATA'
Can you help me to learn more?
(Other definitions for errata that I've seen before include "Mistakes in printing or writing" , "Listed errors" , "List of printing mistakes" , "List of errors" , "List of printed mistakes" .)