Giving lecture, do numbers that prime divides (8)
I believe the answer is:
speaking
'giving lecture' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Maybe there's an association between them I don't understand?
'do numbers that prime divides' is the wordplay.
'do numbers' becomes 'sing' (I've seen this in another clue).
'that prime' becomes 'peak' (synonyms).
'divides' means one lot of letters goes inside another (inserted letters divide the word).
'sing' going around 'peak' is 'SPEAKING'.
Can you help me to learn more?
(Other definitions for speaking that I've seen before include "Saying something" , "Conversing" , "oratory" , "Uttering" , "Talking" .)