It's not slow to put a thought into words (7)
I believe the answer is:
express
'words' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'it's not slow to put a thought' is the wordplay.
I cannot really see how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
'into' is the link.
Can you help me to learn more?
(Other definitions for express that I've seen before include "At high speed like some post" , "Explicit" , "Articulate, give voice to" , "Rapid" , "clear > couch" .)