Nom de plume that could be Dumpynose? (9)
I believe the answer is:
pseudonym
'nom de plume' 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?
'could be dumpynose?' is the wordplay.
'could be' is an anagram indicator.
'dumpynose' anagrammed gives 'PSEUDONYM'.
'that' is the link.
Can you help me to learn more?
(Other definitions for pseudonym that I've seen before include "Fictitious name used by author" , "Lewis Carroll, for one" , "Boz was for Dickens" , "Cinephile, for one" , "Fictitious identity" .)