Skinflint has no money? That's the wrong description (8)
I believe the answer is:
misnomer
'the wrong description' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'skinflint has no money?' is the wordplay.
'skinflint' becomes 'miser' (synonyms).
'has' means one lot of letters goes inside another.
'money?' becomes 'm' (abbreviation used in economics).
'no'+'m'='nom'
'miser' going around 'nom' is 'MISNOMER'.
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for misnomer that I've seen before include "Name wrongly applied to something" , "bad term" , "Wrong name or term" , "Inapt term" , "Unsuitable designation" .)