Medico treating vile tommyrot (6)
I believe the answer is:
drivel
'tommyrot' 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?
'medico treating vile' is the wordplay.
'medico' becomes 'Dr' (synonyms).
'treating' is an anagram indicator.
'vile' with letters rearranged gives 'ivel'.
'dr'+'ivel'='DRIVEL'
Can you help me to learn more?
(Other definitions for drivel that I've seen before include "Silly talk, twaddle" , "Silly talk, sheer nonsense" , "Stuff and nonsense" , "Foolish talk" , "Nonsensical talk" .)