Series is about cot designed by Frenchman (6)
I believe the answer is:
sitcom
'series' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'is about cot designed by frenchman' is the wordplay.
'about' shows that the letters should be reversed in order.
'designed' indicates an anagram (designed with the letters).
'by' is a charade indicator (letters next to each other).
'frenchman' becomes 'm' (abbreviation for Monsieur - like 'Mr').
'is' reversed gives 'si'.
'cot' is an anagram of 'tco'.
'si'+'tco'+'m'='SITCOM'
Can you help me to learn more?
(Other definitions for sitcom that I've seen before include "Fresh Meat, for example" , "Amusing TV series (abbr.)" , "this could be fun" , "Shortened form of situation comedy" , "Type of comedy show" .)