Bit of dope? (4)
I believe the answer is:
fact
'dope?' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'bit' is the wordplay.
I cannot quite see how this works, but
'bit' could be 'act' (synonyms) and 'act' is located in the answer.
A single letter 'f' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for fact that I've seen before include "Statement of verifiable information" , "Verifiable truth" , "Undisputed truth" , "True statement" , "An indisputable truth" .)