Barnet's loose talk (6)
I believe the answer is:
banter
'talk' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'barnet's loose' is the wordplay.
'loose' is an anagram indicator (letters are loosened from their original positions).
'barnet' anagrammed gives 'BANTER'.
Can you help me to learn more?
(Other definitions for banter that I've seen before include "Playful exchange of teasing remarks" , "Light-hearted chaff or teasing" , "Good-natured teasing" , "Badinage" , "Teasing chit-chat" .)