Shakespearean character, male – figure indicative of opposition (7)
I believe the answer is:
antonym
'figure indicative of opposition' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I don't see?
'shakespearean character male' is the wordplay.
'shakespearean character' becomes 'antony' (I've seen this before).
'male' becomes 'm' (common abbreviation).
'antony'+'m'='ANTONYM'
Can you help me to learn more?
(Other definitions for antonym that I've seen before include ""Loud" as opposed to "quiet", for example" , "A word opposite in meaning to another" , "Opposite-meaning word" , "something completely different" , "opposing description" .)