Crossword Genius

My sons possibly absorbing extremely nerdy contents of thesauri? (8)

Ross

I believe the answer is:

synonyms

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'contents of thesauri?' is the definition.
The answer and definition can be both related to communication as well as being plural nouns.
Perhaps they are linked in a way I don't understand?

'my sons possibly absorbing extremely nerdy' is the wordplay.
'possibly' indicates an anagram.
'absorbing' is an insertion indicator.
'extremely' says to hollow out the word (remove centre letters) (only the extremes of the word are used).
'nerdy' with its middle taken out is 'ny'.
'my'+'sons'='mysons'
'mysons' anagrammed gives 'synoms'.
'synoms' going around 'ny' is 'SYNONYMS'.

Can you help me to learn more?

(Other definitions for synonyms that I've seen before include "Words with meanings similar to those of others" , "words such as faith, religion and belief" , "Words that can be interchanged with others" , "Two words with the same meaning" , "Interchangeable words" .)

I've seen this clue in The Independent.
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