Dim English sergeant involved in a squabble (12)
I believe the answer is:
disagreement
'a squabble' 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?
'dim english sergeant involved' is the wordplay.
'english' becomes 'E' (abbreviation).
'involved' indicates anagramming the letters (involved can mean confusing or complex).
'dim'+'e'+'sergeant'='dimesergeant'
'dimesergeant' with letters rearranged gives 'DISAGREEMENT'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for disagreement that I've seen before include "Contretemps" , "dispute" , "Lack of consensus" , "Difference of opinion" , "Quarrel" .)