Is there humour in its brevity? (6)
I believe the answer is:
sitcom
'brevity?' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps you can see an association between them that I can't see?
'is there humour in its' is the wordplay.
I cannot quite see how this works, but
an anagram of 'its' is 'sit' which is within the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for sitcom that I've seen before include "Type of comedy show" , "Kind of TV programme" , "Light-hearted TV series" , "Shortened form of situation comedy" , "Humorous TV programme" .)